CN106324969B

CN106324969B - A kind of positive throwing optical microstructures curtain based on black silicon film solar batteries

Info

Publication number: CN106324969B
Application number: CN201610802457.3A
Authority: CN
Inventors: 钱俊; 王子强; 廖宇
Original assignee: Sino Tech Co Ltd
Current assignee: Sino Tech Co Ltd
Priority date: 2016-09-05
Filing date: 2016-09-05
Publication date: 2017-11-21
Anticipated expiration: 2036-09-05
Also published as: CN106324969A

Abstract

The invention provides a kind of positive throwing optical microstructures curtain based on black silicon film solar batteries, and including at least PET base layer, the black silicon film solar batteries of triangular shape being distributed in microarray are provided with the PET base layer；The longitudinal section structure triangular in shape of the black silicon film solar batteries of triangular shape；The black silicon film solar batteries are made up of each level stacked on top of one another, wherein the level positioned at bottommost is metal back electrode, the level positioned at top is metal gate electrode, the equal triangular shape in longitudinal section of each level；The projection in pyramid micro-structural shape is densely covered with the upper surface of the black silicon light-absorption layer, when the ambient light in the external world exposes to black silicon light-absorption layer from all angles, light carries out multiple reflections absorption between projection and thoroughly absorbed until being hacked silicon light-absorption layer, so as to which the solar energy absorbed is converted into electric energy by black silicon film solar batteries；The metal back electrode can be reflected the light come from obliquely downward irradiation.

Description

A kind of positive throwing optical microstructures curtain based on black silicon film solar batteries

Technical field

The invention provides a kind of optical microstructures curtain, and particularly providing one kind can either resist external environmental light to disturb, And can enough absorbs the positive throwing optical microstructures curtain based on black silicon film solar batteries that luminous energy is converted into electric energy simultaneously, belongs to Optical material technical field.

Background technology

Projection screen is under daylight or light influence, and contrast, the saturation degree of institute's projected image are greatly reduced, and color is also Originality is undesirable, therefore projection screen is used under high-brightness environment, solves interference of the ambient light to drop shadow effect and just seems outstanding To be important.

In existing optics curtain, U.S. patent Nos US6842282B2 is combined using soot layer and grating layer Structure, absorb component environment light using the traceability reflex characteristic of glass microballoon, and with the blacking side wall of grating, improve throwing The contrast of shadow image, but due to glass microballoon trace to the source characteristic it is intrinsic the characteristics of make it that part reflection light offset direction is excessive, Projected image brightness drastically declines, and picture brightness loss is serious.Chengdu Fscreen Science ＆ Technology Co., Ltd.'s patent of invention CN104062839A uses the structure that metal medium minute surface reflective membrane and microprism array structure layer and diffusing reflection layer are combined, Absorbed layer is added in a side wall of microprism array structure layer to absorb ambient light, metal medium minute surface reflective membrane is by high Specular reflectivity, for improving picture gain so that projected picture has good contrast, but light used in this invention It is more low to absorb layer material extinction efficiency, under the outdoor environment of high brightness, ambient light influences still more tight on projected picture Weight, picture contrast, color rendition degree are all a greater impact, and the light reflected from metal medium minute surface reflective membrane can not Diffusing reflection layer is all introduced into, this causes some light to lose, and has large effect to drop shadow effect.

The content of the invention

The invention provides a kind of positive throwing optical microstructures curtain based on black silicon film solar batteries, solve existing Deficiency in technology, the curtain can be greatly enhanced the absorbability to environmental disturbances light so that curtain is under bright light environments Can be with the reduction institute projected picture of high-contrast high saturation；The light that black silicon film solar batteries will can also be absorbed simultaneously It can be converted into after electric energy again to projecting apparatus power supply, energy-conserving and environment-protective.

Technical scheme is used by realizing above-mentioned purpose of the present invention：

A kind of positive throwing optical microstructures curtain based on black silicon film solar batteries, it is described including at least PET base layer The black silicon film solar batteries of triangular shape being distributed in microarray, adjacent two black silicon of triangular shape are provided with PET base layer Spacing between thin-film solar cells is not more than the 1/2 of projected image pixel；The black silicon film solar batteries of triangular shape Longitudinal section structure triangular in shape, the angle in the triangular structure between ramp and PET base layer is 30~90 degree, under Angle between inclined-plane and PET base layer is 30~65 degree；The black silicon film solar batteries are by metal gate stacked on top of one another Electrode, black silicon light-absorption layer, P-type silicon layer, N-type silicon layer and metal back electrode composition, wherein the level positioned at bottommost is metal Back electrode, the level positioned at top are metal gate electrode, the equal triangular shape in longitudinal section of each level, and each triangle has one Individual common summit；

The projection in pyramid micro-structural shape is densely covered with the upper surface of the black silicon light-absorption layer, it is described raised and projection Between root be connected, when the external world ambient light expose to black silicon light-absorption layer from all angles when, light is in two micro- knots of pyramid Carry out multiple reflections absorption between the projection of structure shape thoroughly to absorb until being hacked silicon light-absorption layer, so as to which black silicon film solar batteries will The solar energy absorbed is converted into electric energy；The metal back electrode can be reflected the light come from obliquely downward irradiation.

Angle between the ramp and PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 Degree.

Compared with prior art, the present invention has advantages below：1st, the present invention is in the environment of high brightness, and ambient light is from each On individual angular illumination to black silicon light-absorption layer, light carried out between the projection of two pyramid micro-structural shapes multiple reflections absorb until Silicon light-absorption layer is hacked thoroughly to absorb.And when the light that projector projects go out is projected on curtain from obliquely downward, light projects On lower inclined plane, and the light that lower inclined plane and can will enough be come from obliquely downward irradiation is reflected, therefore the light that projecting apparatus is projected Line enters human eye after reflection.So positive throwing optical microstructures curtain provided by the present invention based on black silicon film solar batteries Cloth still can keep the high-contrast and color rendition degree of institute's projected picture in the environment of high brightness.2nd, the black silicon thin film sun The luminous energy absorbed further can also be converted into electric energy, can be provided again for projecting apparatus by energy battery by after extraneous light absorbs Certain electric power support, energy-conserving and environment-protective.

Brief description of the drawings

Fig. 1 is the vertical section structure figure of optical microstructures curtain provided by the invention；

Fig. 2 is the surface texture shape appearance figure of black silicon light-absorption layer；

Fig. 3 is the extinction principle demonstration figure of black silicon light-absorption layer；

In figure：1-PET basalises, 2- metal gate electrodes, the black silicon light-absorption layers of 3-, 4-P type silicon layers, 5-N type silicon layers, 6- metals Back electrode.

Embodiment

Below in conjunction with the accompanying drawings and specific embodiment does detailed specific description to the present invention, but protection scope of the present invention It is not limited to following examples.

Structure such as Fig. 1 institutes of positive throwing optical microstructures curtain provided by the present invention based on black silicon film solar batteries Show, be provided with the PET base layer 1 in microarray be distributed the black silicon film solar batteries of triangular shape, adjacent two three Spacing between the black silicon film solar batteries of horn shape is not more than the 1/2 of projected image pixel.The black silicon thin film of triangular shape is too It is positive can battery longitudinal section structure triangular in shape, the angle in the triangular structure between ramp and PET base layer is 30 ~90 degree, the angle between lower inclined plane and PET base layer is 30~65 degree；In the present embodiment preferably, the ramp with Angle between PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 degree.

The black silicon film solar batteries are by metal gate electrode 2 stacked on top of one another, black silicon light-absorption layer 3, P-type silicon layer 4, N Type silicon layer 5 and metal back electrode 6 form, wherein the level positioned at bottommost is metal back electrode 6, positioned at the level of top For metal gate electrode 2.The equal triangular shape in longitudinal section of each level above, and each triangle has a common summit.

The projection in pyramid micro-structural shape is densely covered with the upper surface of the black silicon light-absorption layer, it is described raised and projection Between root be connected, as shown in Figure 2；When the ambient light in the external world exposes to black silicon light-absorption layer from all angles, light is at two Carry out multiple reflections absorption between the projection of pyramid micro-structural shape thoroughly to absorb until being hacked silicon light-absorption layer, as shown in Figure 3.So as to The solar energy absorbed is converted into electric energy by black silicon film solar batteries；The metal back electrode will can irradiate from obliquely downward The light come is reflected.

Environment of the positive throwing optical microstructures curtain provided by the invention based on black silicon film solar batteries in high brightness Down in use, ambient light (electric light or sunshine, being normally at oblique upper) is exposed on black silicon light-absorption layer from all angles, light Multiple reflections absorption is carried out between the projection of two pyramid micro-structural shapes thoroughly to absorb until being hacked silicon light-absorption layer.And when projection When the light that instrument projects is projected on curtain from obliquely downward, light is projected on lower inclined plane, and lower inclined plane and can enough will be from oblique The light that lower section irradiation comes is reflected, therefore the light that projecting apparatus is projected enters human eye after reflection.It is so of the invention The positive throwing optical microstructures curtain based on black silicon film solar batteries provided still can be protected in the environment of high brightness Hold the high-contrast and color rendition degree of institute's projected picture.

Claims

A kind of 1. positive throwing optical microstructures curtain based on black silicon film solar batteries, including at least PET base layer, its feature It is：Be provided with the PET base layer in microarray be distributed the black silicon film solar batteries of triangular shape, adjacent two three Spacing between the black silicon film solar batteries of horn shape is not more than the 1/2 of projected image pixel；The black silicon thin film of triangular shape is too It is positive can battery longitudinal section structure triangular in shape, the angle in the triangular structure between ramp and PET base layer is 30 ~90 degree, the angle between lower inclined plane and PET base layer is 30~65 degree；The black silicon film solar batteries are by stacked on top of one another Metal gate electrode, black silicon light-absorption layer, P-type silicon layer, N-type silicon layer and metal back electrode composition, wherein the layer positioned at bottommost Secondary is metal back electrode, and the level positioned at top is metal gate electrode, the equal triangular shape in longitudinal section of each level, and each three It is angular to have a common summit；

The projection in pyramid micro-structural shape, root between the projection and projection are densely covered with the upper surface of the black silicon light-absorption layer Portion is connected, and when the ambient light in the external world exposes to black silicon light-absorption layer from all angles, light is in two pyramid micro-structural shapes Projection between carry out multiple reflections and absorb until being hacked silicon light-absorption layer and thoroughly absorbing, so as to which black silicon film solar batteries will be inhaled The solar energy of receipts is converted into electric energy；The metal back electrode can be reflected the light come from obliquely downward irradiation.
2. the positive throwing optical microstructures curtain according to claim 1 based on black silicon film solar batteries, its feature exist In：Angle between the ramp and PET base layer is 35 degree, and the angle between lower inclined plane and PET base layer is 55 degree.