CN104638036B - High photoresponse near infrared photodetector - Google Patents

High photoresponse near infrared photodetector Download PDF

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Publication number
CN104638036B
CN104638036B CN201410229544.5A CN201410229544A CN104638036B CN 104638036 B CN104638036 B CN 104638036B CN 201410229544 A CN201410229544 A CN 201410229544A CN 104638036 B CN104638036 B CN 104638036B
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film
selenizing
selenium
near infrared
selenization
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CN104638036A (en
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唐江
冷美英
罗苗
夏哲
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WUHAN INDUSTRIAL INSTITUTE FOR OPTOELECTRONICS Co Ltd
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WUHAN INDUSTRIAL INSTITUTE FOR OPTOELECTRONICS Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/08Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
    • H01L31/09Devices sensitive to infrared, visible or ultraviolet radiation
    • H01L31/095Devices sensitive to infrared, visible or ultraviolet radiation comprising amorphous semiconductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/0216Coatings

Abstract

A kind of high photoresponse near infrared photodetector, it is characterised in that:Concrete structure is transparent inert substrate/selenizing Sb film/electrode, and wherein selenizing Sb film is the selenizing Sb film of selenization after passing through;Selenization is after described:Selenizing Sb film is made annealing treatment in selenium atmosphere, wherein:The selenium steam partial pressure of the selenium atmosphere is 1~10000Pa, and annealing temperature is 150~400 DEG C, and processing time is 5~30min;Or one layer of selenium is deposited in antimony selenide film surface, then made annealing treatment again, wherein:The thickness of the selenium of deposition is 1~500nm, and annealing temperature is 150~400 DEG C, and annealing time is 10~60min.The abundant raw materials of the high photoresponse near infrared photodetector of the present invention, cheap, technique is simple, economical, workable, and has high sensitivity.

Description

High photoresponse near infrared photodetector
Technical field
The invention belongs to semiconductor photoelectronic device technical field, and in particular to a kind of high photoresponse near infrared light electrical resistivity survey is surveyed Device.
Background technology
Antimony selenide(Sb2Se3)Belong to V-VI race's banding compound semiconductor, there is good photoelectric respone and thermoelectricity to imitate Should, it is that a kind of very promising film photovoltaic absorbs layer material, it has suitable 1~1.2eV of energy gap, big extinction system Number(Shortwave absorptivity>105 cm-1), raw material are nontoxic and rich reserves, but its application is not taken seriously but always.To current Untill, there is not yet antimony selenide to be used for the report for preparing photodetector.
In recent years, with the development of optical communication technique, high response, high-quantum efficiency, high specific detecivity and Gao Xiang are prepared Answer the near infrared photodetector of frequency bandwidth turns into the target that domestic and international researcher is pursued.The III- such as InGaAs/InP Detective quantum efficiency height, the dark current of V races semi-conducting material preparation are small, but its expensive, heat conductivility and mechanical performance It is poor to limit its application in optoelectronic integrated technology.In the data of literatures reported before this, it is understood that doping energy The carrier concentration of semi-conducting material is significantly changed, particularly with transparent conductive film, incorporation impurity can make it have very high Carrier concentration, so as to influence its energy gap, for example, Authorization Notice No. be CN 100541828C patent disclose one Photodetector of the kind for 650nm fiber optic communications, it is the P of heavy doping+Superficial layer/P-type layer/low-doped N-Type epitaxial layer/heavily doped Miscellaneous N+Substrate layer four-layer structure, obtained detector I-V characteristic is good, dark current is small, optical responsivity is high, but this method technique is relative Complexity, and need strictly effectively control doping, severe reaction conditions, processing cost is higher, can industrialization degree it is low;Shen Qing Publication Number it isCN103280484APatent disclose a kind of p-type graphene film/n-type Ge schottky junction near infrared lights Electric explorer and preparation method thereof, Authorization Notice No. areCN101576413A kind of C GaAs bases InAs/GaSb superlattices of patent 1 to 3 micron waveband infrared photoelectric detector, the infrared photoelectric detector by GaAs substrates from bottom to top, GaAs cushions, AlSb nucleating layers, GaSb bottom breakers, AlSb/GaSb superlattice layers, the upper cushions of GaSb, InAs/GaSb superlattice layers, GaSb Cap rock and titanium alloy electrode are formed., but these method practical operations get up to run into the problem of many new, increase detector The cost of production.
The doping concentration of the selenizing Sb film prepared using the various techniques in currently available technology is relatively low, only 1013~ 1014 cm-3Left and right, so as to limit the raising of antimony selenide film photoelectric detector photoresponse.Application publication number is CN 103343323 A patent discloses a kind of CIGS thin-film preparation method, including is copper to the CIGS initialization layer Indium gallium carries out selenizing and annealing, but the processing method, primarily to preparing CIGS thin-film, control CIGS is answered The proportioning of miscellaneous quaternary compound, so as to improve the photoelectric transformation efficiency of the solar cell of CIGS thin-film, there is presently no The photoresponse of antimony selenide film is improved by selenizing and then prepares selenizing Sb film near infrared light electricity with it was found that pertinent literature is related to Detector.Therefore, a kind of abundant raw materials are sought, cheap, technique is simple, economical, workable, and has high sensitivity Light-detecting device, be the major issue that the current field is urgently researched and solved.
The content of the invention
Part in view of the shortcomings of the prior art, it is an object of the invention to provide a kind of high photoresponse near infrared light electricity Detector, it has abundant raw materials, cheap, and technique is simple, economical, workable, and has high sensitivity.
To achieve the above object, the technical solution adopted by the present invention is as follows:A kind of high photoresponse near infrared photodetector, It is characterized in that:Concrete structure is transparent inert substrate/selenizing Sb film/electrode, and wherein selenizing Sb film is selenizing after warp The selenizing Sb film of processing;
Selenization is after described:Selenizing Sb film is made annealing treatment in selenium atmosphere, wherein:The selenium atmosphere Selenium steam partial pressure is 1~10000Pa, and annealing temperature is 150~400 DEG C, and processing time is 5~30min;
Or one layer of selenium is deposited in antimony selenide film surface, then made annealing treatment again, wherein:The thickness of the selenium of deposition is 1~500nm, annealing temperature are 150~400 DEG C, and annealing time is 10~60min.
Above-mentioned selenium atmosphere can be produced by thermal evaporation or other heating means, and transparent inert substrate is white glass or ceramics Piece etc., the electrode are Au electrodes.
It is cheap because antimony selenide raw material are nontoxic and rich reserves, the selenizing of selenization after the present invention Sb film, selenizing Sb film selenium room V can be reducedSe, increase selenium is in antimony position doping SeSb, so as to improve the doping of selenizing Sb film Concentration simultaneously improves the lifting that back electrode contact reaches device performance, improves the photoresponse of antimony selenide film photoelectric detector, makes it Cheap so as to obtain abundant raw materials with high sensitivity, technique is simple, economical, workable, and with height The photodetector of sensitivity, the effect for improving open-circuit voltage can also be obtained by being applied on solar cell.With existing skill Art is compared, and the inventive method has advantages below and progress:(1)New raw material approach is opened for photodetector;(2)This hair The bright antimony selenide film equality prepared by rear selenization antimony selenide film light that is high, therefore being prepared using the inventive method Electric explorer quality is high;(3)The inventive method while detector photoresponse is greatly improved, is not changed by rear selenization Antimony selenide film surface appearance and internal structure, the change to energy gap is also smaller, it is somewhat broadened and have it is more suitable Energy gap;(4)This method technical process is simple, and technological parameter is easily controlled, and easily accomplishes scale production, and energy consumption Low, remarkable in economical benefits, the minority carrier life time of antimony selenide film photoelectric detector of the invention is higher, is not losing the feelings of responsiveness Brightness electric current is significantly lifted under condition, and specific detecivity has also been lifted, and substantially increases the performance of detector, preferably should be had Use prospect.
Brief description of the drawings
Fig. 1 be in the embodiment of the present invention 1 after in the selenizing Sb film of selenization and comparative example 1 without after selenization Selenizing Sb film electric field scanning exterior view;
Fig. 2 be in the embodiment of the present invention 1 after in the selenizing Sb film of selenization and comparative example 1 without after selenization Selenizing Sb film absorption curve;
Fig. 3 be in the embodiment of the present invention 1 after in the selenizing Sb film of selenization and comparative example 1 without selenization The energy gap matched curve of selenizing Sb film;
Fig. 4 be in the embodiment of the present invention 1 after in the selenizing Sb film of selenization and comparative example 1 without selenization The photoresponse curve of selenizing Sb film;
Fig. 5 be the embodiment of the present invention 1 of the embodiment of the present invention 1 after in the selenizing Sb film of selenization and comparative example 1 not The X-ray diffraction curve of selenizing Sb film through selenization;
Fig. 6 is the antimony selenide film photoelectric detector that selenization obtains after selenizing Sb film in the embodiment of the present invention 1 Current-voltage is efficiency curve;
Fig. 7 is the electric field scanning surface pattern that antimony selenide film surface deposits one layer of selenium after annealing in the embodiment of the present invention 2;
Fig. 8 is the absorption curve of one layer of selenium after annealing of antimony selenide thin film deposition in the embodiment of the present invention 2;
Fig. 9 is the energy gap matched curve of one layer of selenium after annealing of antimony selenide thin film deposition in the embodiment of the present invention 2;
Figure 10 is the photoresponse curve of one layer of selenium after annealing of antimony selenide thin film deposition in the embodiment of the present invention 2;
Figure 11 is the antimony selenide film photoelectric detector that selenization obtains after selenizing Sb film in the embodiment of the present invention 2 Current-voltage is efficiency curve.
Embodiment
The process that specific embodiment illustrates to prepare high photoresponse near infrared photodetector is exemplified below, but the present invention is simultaneously It is not limited to following embodiments.Rear selenization process conditions in following embodiments are that experiment is optimal, but the present invention's is upper Stating content can be applied to improve near infrared photodetector photoresponse, only be illustrated below with preferable treatment conditions.
Embodiment 1
A kind of high photoresponse near infrared photodetector, concrete structure are transparent inert substrate/selenizing Sb film/electrode, Wherein selenizing Sb film is obtained using rear selenization;
Its specific preparation process is as follows:
Step 1:Cleaning base plate:With deionized water, acetone, isopropanol, it is white that deionized water cleans transparent inert substrate successively Each 16 minutes of glass, then dried up with nitrogen gun;
Step 2:Using thermal evaporation, the transparent inert substrate white glass surface deposits selenizing Sb film in step 1, Source temperature is 330 DEG C, and substrate heating temperature is 290 DEG C, evaporation time 40min, and the selenizing Sb film of the deposition is thick Spend for 500nm;
Step 3:Selenizing Sb film described in step 2 is made annealing treatment in selenium atmosphere, the selenium atmosphere is to pass through Thermal evaporation produces, wherein:Source temperature is 200 DEG C, and substrate heating temperature is 250 DEG C, evaporation time 10min, described The selenium steam partial pressure of selenium atmosphere is 100Pa, and annealing temperature is 150 DEG C, and the annealing time is 30min;
Step 4:Using thermal evaporation, the selenium layer surface deposits 50nm gold electrodes in step 3, wherein:Electrode is grown 15mm, electrode spacing 0.2mm.
Embodiment 2
A kind of high photoresponse near infrared photodetector, concrete structure are transparent inert substrate/selenizing Sb film/electrode, Wherein selenizing Sb film is obtained using rear selenization;
Its specific preparation process is as follows:
Step 1:Cleaning base plate:Transparent inert substrate pottery is cleaned successively with deionized water, acetone, isopropanol, deionized water Each 16 minutes of ceramics, then dried up with nitrogen gun;
Step 2:Using thermal evaporation, the transparent inert substrate potsherd surface deposits selenizing Sb film in step 1, Source temperature is 330 DEG C, and substrate heating temperature is 290 DEG C, evaporation time 40min, and the selenizing Sb film of the deposition is thick Spend for 500nm;
Step 3:Described antimony selenide film surface deposits one layer of selenium in step 2, and wherein source temperature is 200 DEG C, Substrate heating temperature is 250 DEG C, evaporation time 10min, and the thickness of the selenium of the deposition is 500nm, then again by SEDIMENTARY SELENIUM Selenizing Sb film afterwards is made annealing treatment, wherein:The annealing temperature is 400 DEG C, annealing time 60min;
Step 4:50nm gold electrodes are deposited using the selenium layer surface after the thermal evaporation in step 3 annealed processing, Wherein:Electrode long 15mm, electrode spacing 0.2mm.
Comparative example
The difference of comparative example and embodiment 1 is:Without rear selenization, it is operated selenizing Sb film prepared by comparative example To remove the step in embodiment 1(3), other steps are identical.
The photodetector obtained to embodiment 1 and embodiment 2 and comparative example carries out performance test, test result respectively As shown in table 1.
The performance comparision table of photodetector made from the embodiment of table 1 and comparative example difference
Photoelectric detector performance parameter Embodiment 1 Embodiment 2 Comparative example
Photoelectric current 45nA 38nA 30nA
Dark current 450nA 410nA 310nA
Responsiveness 10 10 10
Specific detecivity 5.6*1010 4.6*1010 3.9*1010
As it can be seen from table 1 the method that photoresponse is improved using selenization selenizing Sb film after the present invention, obtained light Electric explorer minority carrier life time is higher, and in the case where not losing responsiveness, brightness electric current is significantly lifted, and specific detecivity is also Improve, therefore the quality of photodetector is improved, inventor has found, for the scope and condition in claim, light The specific detecivity and brightness electric current of electric explorer also all improve.Therefore, visited using in the present invention by improving photoelectricity Overall performance is greatly improved after surveying the rear selenization method of the photoresponse of device.
Obviously, those skilled in the art can carry out the structure of various changes and modification without departing from the present invention to the present invention Think of and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (1)

  1. A kind of 1. high photoresponse near infrared photodetector, it is characterised in that:Selenizing after selenizing Sb film to crystallization is carried out Processing improves the p-type doping concentration of selenizing Sb film so as to obtaining high photoresponse near infrared photodetector;Concrete structure is Bright inert substrate/selenizing Sb film/electrode, wherein selenizing Sb film are the selenizing Sb film of selenization after passing through;
    Selenization is after described:Selenizing Sb film is made annealing treatment in selenium atmosphere, wherein:The selenium of the selenium atmosphere steams Qi leel pressure is 1~10000Pa, and annealing temperature is 150~400 DEG C, and processing time is 5~30min;
    Or one layer of selenium is deposited in antimony selenide film surface, then made annealing treatment again, wherein:The thickness of the selenium of deposition be 1~ 500nm, annealing temperature are 150~400 DEG C, and annealing time is 10~60min;
    The near infrared photodetector, its structure are inert substrate/selenizing Sb film/metal, are photoconduction type photodetection Device, and be Ohmic contact between selenizing Sb film and metal.
CN201410229544.5A 2014-05-28 2014-05-28 High photoresponse near infrared photodetector Active CN104638036B (en)

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CN110416356A (en) * 2019-07-10 2019-11-05 西安交通大学 A kind of preparation method of antimony selenide thin-film solar cells

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CN105632771B (en) * 2016-03-16 2018-03-06 三峡大学 A kind of Sb2Se3Preparation method of the film to electrode material
CN106129143B (en) * 2016-07-01 2017-09-01 武汉光电工业技术研究院有限公司 A kind of high orientation selenizing Sb film and preparation method thereof
CN107275441A (en) * 2017-06-20 2017-10-20 湖南商学院 A kind of preparation method of photodetector
CN110061090A (en) * 2019-04-30 2019-07-26 福建农林大学 Photodetector and preparation method thereof based on single antimony selenide nano wire PN junction
CN113972292B (en) * 2021-03-29 2024-03-19 南京大学 InP-based band gap adjustable structure and photoelectric conversion device

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CN110416356A (en) * 2019-07-10 2019-11-05 西安交通大学 A kind of preparation method of antimony selenide thin-film solar cells

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