JP2010521061A - ドープされたナノ粒子系半導体接合 - Google Patents
ドープされたナノ粒子系半導体接合 Download PDFInfo
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- JP2010521061A JP2010521061A JP2009550855A JP2009550855A JP2010521061A JP 2010521061 A JP2010521061 A JP 2010521061A JP 2009550855 A JP2009550855 A JP 2009550855A JP 2009550855 A JP2009550855 A JP 2009550855A JP 2010521061 A JP2010521061 A JP 2010521061A
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- semiconductor
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- annealing
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
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Abstract
【選択図】図4
Description
(a)第一のドープされた半導体層が第一の極性を有し、該第一の層は融合した半導体ナノ粒子を含むように、ドナーまたはアクセプターをドープされた、基材の上の第一の多結晶性半導体層;および
(b)該半導体接合を形成するように、該第一の半導体層と接触する、基材の上の第二の層。
(a)第一のドープされた半導体層が第一の極性を有し、該第一の層が半導体ナノ粒子を含むように、ドナーまたはアクセプターをドープされた第一の多結晶性半導体層を基材の上で形成し;
(b)該第一の半導体層と接触する第二の層を基材の上で形成して、該半導体接合を形成し;および
(c)該第二の層を形成する前または後のいずれかで、該付着した第一の層をアニーリングすること。
この例では、ドープされた半導体接合500を、Inでインサイチュドーピングしたn−CdSe層とp−Si基材の間に形成した。このp−Si基材は、約5Ω−cmの抵抗を有する。ドープされていないCdSe量子細線300を、PradhanらのドープされていないCdSeナノ細線のための手順(N.Pradhanら,Nano Letters 6,720(2006))に基づく手順により形成した。我々のバージョンでは、カドミウム前駆体は酢酸カドミウムであり、インジウム前駆体はインジウム酢酸水和物であり、そしてSe前駆体はセレノ尿素である。この合成では、等モル量(1.27×10-4モル)の酢酸カドミウムおよびセレノ尿素を使用した。この試験により、Inモル濃度がカドミウムモル濃度の0.1%であるときに、ドープされたCdSe層の抵抗が最小になることが明らかにされた。成長のための配位溶媒(coordinating solvent)はオクチルアミン(OA)であり、それは使用前に30分間30℃で脱ガスした。
この例では、ドープされた半導体接合500を、Cuでエクスサイチュドーピングしたp−ZnTe層とn−Si基材の間に形成した。このn−Si基材は、約5Ω−cmの抵抗を有する。ドープされていないZnTe半導体ナノ粒子410を、ZnSe球状ドットを形成するために一般的に使用される手順を適用することにより合成した(M.A.Hinesら、J.Phys.Chem.B102,3655(1998))。より具体的には、4gの乾燥し脱ガスしたヘキサデシルアミン(HDA)を三つ口フラスコに入れて加熱し、アルゴン下で、シュレンクライン上で290℃にした。Te前駆体については、トリオクチルフォスフィン(TOP)中Teの0.25M溶液(TOPTeと呼ばれる)を、真空下でTe粉末とTOPの混合物を、3〜4時間、活発に撹拌しながら、190℃で加熱することによって形成した。結果として得られた溶液は透明で、且つ緑−黄色の外観を有していた。乾燥箱の中で、シリンジに0.4mモルのジエチル亜鉛(ヘキサン溶液中の1Mジエチル亜鉛に由来)、1.6mモルのTOPTe、および2.0mlの追加のTOPを充填した。このシリンジ内容物は、三ツ口フラスコに迅速に注入され、その溶液は活発に撹拌されていた。室温のZn/Teストック溶液に注入した結果として、反応温度は急速に約25℃下がった。それを、オレンジ−赤発行ZnTeナノ結晶(室内光で見ることができる)を形成するために、10分間265℃で維持した。ZnTe粗溶液の蛍光スペクトルが図4に示される。ZnTe量子ドット粗溶液の紫外−可視(UV−VIS)吸収スペクトルは、このドットが明確な室温第一励起子吸収ピークを約430nmに有することを示す。
最後の例では、ドープされた半導体接合500を、Cuでエクスサイチュドープされたp−ZnTe層とInでインサイチュドープされたn−CdSe層の間に形成した。n−CdSeの接触を簡単にするために、ガラスの代わりにn−Siに付着させた。したがって、全体のダイオード構造は、p−ZnTe:n−CdSe:n−Siであった。CuドープされたZnTe層とInドープされたCdSe層の両方は、それぞれ、例2および1のために使用したのと同じ分散体を使用して形成した。19mm正方形n−Si片から開始し、同様の手順(例1および2参照)を続けて、Al金属をn−Siの裏側に適用し、および両方のナノ粒子系分散体をドロップキャスティングした。半導体表面での酸化物形成を防ぐために、全てのドロップキャスティングは乾燥箱中で行った。混合したCuおよびZnTe分散体をn−CdSeフィルム表面にドロップキャスティングする前に、フィルム表面をアセトンおよびメタノールで洗浄した。In−ドープされたn−CdSeフィルム付着の後、ダイオードを例1で記載したようにアニーリングし;Cu−ドープされたp−ZnTeフィルム付着後に、ダイオードを例2で記載したようにアニーリングした。Pd/Agを付着しおよびアニーリングするための、例2で記載された手順を続けて、p−ZnTeにオーム接触を適用した。
100 基板
105 発光ダイオードデバイス
110 p−接触層
120 p−輸送層
130 本来的に備わっているエミッタ層
140 n−輸送層
150 n−接触層
160 アノード
170 カソード
200 半導体コア
205 無機ナノ粒子
210 有機配位子
300 量子細線
305 インサイチュでドープされた半導体ナノ粒子
310 ドーパント原子
400 エクスサイチュでドープされた半導体層
410 半導体ナノ粒子
420 ドーパント材料ナノ粒子
430 半導体層
500 ドープされた半導体接合
510 第一の半導体層
520 第二の層
Claims (23)
- 電子デバイスにおいて使用するためのドープされた半導体接合を製造する方法であって、
(a)第一のドープされた半導体層が第一の極性を有し、該第一の層が半導体ナノ粒子を含むように、ドナーまたはアクセプターをドープされた第一の多結晶性半導体層を基材の上で形成し;
(b)該第一の半導体層と接触する第二の層を基材の上で形成して、該半導体接合を形成し;および
(c)該第二の層を形成する前または後のいずれかで、該付着した第一の層をアニーリングすること、
を含んでなる、方法。 - 該第一または第二の層が最初に形成される、請求項1に記載の方法。
- 該半導体が、IV、III−V、II−VI、またはIV−VI型半導体材料から選択される、請求項1に記載の方法。
- 該半導体がII−VI型化合物であり、且つ該ドーパントが、Ia、Ib、III、V、またはVII族材料である、請求項3に記載の方法。
- 該半導体がIII−V型化合物であり、且つ該ドーパント原子がIIa、IIb、IV、またはVI族材料である、請求項3に記載の方法。
- 該半導体がIV型材料であり、且つ該ドーパント原子がIIIまたはV族材料である、請求項3に記載の方法。
- 該半導体がIV−VI型材料であり、且つ該ドーパント原子がIII、V、またはVII族材料である、請求項3に記載の方法。
- 該第二の層が、ドープされた若しくはドープされていない半導体、または金属である、請求項1に記載の方法。
- 該第二の層が、第二の極性を有する半導体である、請求項8に記載の方法。
- 該第二の層がナノ粒子から形成される、請求項1に記載の方法。
- 該半導体接合が、ホモ接合、ヘテロ接合、またはショットキー接合である、請求項1に記載の方法。
- 該第二の層が該基材である、請求項1に記載の方法。
- 該第一の層が、ドナーまたはアクセプターをインサイチュまたはエクスサイチュでドープされる、請求項1に記載の方法。
- 該インサイチュでドープされた第一の層が、
(a)コロイド溶液において表面有機配位子を有するインサイチュでドープされた半導体ナノ粒子を成長させ;
(b)該インサイチュでドープされた半導体ナノ粒子を該表面に付着させ;
(c)該インサイチュでドープされた半導体ナノ粒子の表面から該有機配位子がボイルオフするように、該付着したインサイチュでドープされた半導体ナノ粒子を第一アニーリングし;および
(d)該付着したインサイチュでドープされた半導体ナノ粒子を第二アニーリングし、それにより、連続的なドープされた半導体層が形成されるように、該インサイチュでドープされた半導体ナノ粒子が融合されること、
を含む、請求項13に記載の方法。 - 該第一アニーリングが、220℃未満の温度で行われる、請求項14に記載の方法。
- 該第二アニーリングが、250℃〜500℃の間の温度で行われる、請求項14に記載の方法。
- 該エクスサイチュでドープされた第一の層が、
(a)コロイド溶液において表面有機配位子を有する半導体ナノ粒子の第一の組を成長させ;
(b)コロイド溶液において表面有機配位子を有するドーパント材料ナノ粒子の第二の組を成長させ;
(c)該半導体ナノ粒子の第一の組と該ドーパント材料ナノ粒子の第二の組の混合物を該基材に付着させ、そこではドーパント材料ナノ粒子より多くの半導体ナノ粒子が存在し;
(d)該ナノ粒子の第一および第二の組の表面から該有機配位子がボイルオフするように、該付着したナノ粒子の混合物を第一アニーリングし;および
(e)該半導体ナノ粒子が融合して連続的な半導体層を形成し、且つ該ドーパント材料原子が該ドーパント材料ナノ粒子から該連続的な半導体層に拡散してエクスサイチュでドープされた半導体輸送層を提供するように、該付着した混合物を第二アニーリングすること、
を含む、請求項13に記載の方法。 - 該第一アニーリングが、220℃未満の温度で行われる、請求項17に記載の方法。
- 該第二アニーリングが、250℃〜500℃の間の温度で行われる、請求項17に記載の方法。
- 該第一の半導体層が第一および第二アニーリングにかけられる、請求項1に記載の方法。
- 該第一アニーリングが、220℃未満の温度で行われる、請求項20に記載の方法。
- 該第二アニーリングが、250℃〜500℃の間の温度で行われる、請求項20に記載の方法。
- 電子デバイスにおいて使用するためのドープされた半導体接合であって、
(a)第一のドープされた半導体層が第一の極性を有し、該第一の層は融合した半導体ナノ粒子を含むように、ドナーまたはアクセプターをドープされた、基材の上の第一の多結晶性半導体層;および
(b)該半導体接合を形成するように、該第一の半導体層と接触する、基材の上の第二の層、を含んでなるドープされた半導体接合。
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CN101611496A (zh) | 2009-12-23 |
CN101611496B (zh) | 2012-11-28 |
TW200847244A (en) | 2008-12-01 |
WO2008105863A1 (en) | 2008-09-04 |
EP2115780A1 (en) | 2009-11-11 |
US20080206972A1 (en) | 2008-08-28 |
US7605062B2 (en) | 2009-10-20 |
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