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柔性衬底上的高效单结砷化镓薄膜太阳能电池。

Highly efficient single-junction GaAs thin-film solar cell on flexible substrate.

作者信息

Moon Sunghyun, Kim Kangho, Kim Youngjo, Heo Junseok, Lee Jaejin

机构信息

Department of Electrical and Computer Engineering, Ajou University, Suwon 443-749, Republic of Korea.

出版信息

Sci Rep. 2016 Jul 20;6:30107. doi: 10.1038/srep30107.

DOI:10.1038/srep30107
PMID:27435899
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4951801/
Abstract

There has been much interest in developing a thin-film solar cell because it is lightweight and flexible. The GaAs thin-film solar cell is a top contender in the thin-film solar cell market in that it has a high power conversion efficiency (PCE) compared to that of other thin-film solar cells. There are two common structures for the GaAs solar cell: n (emitter)-on-p (base) and p-on-n. The former performs better due to its high collection efficiency because the electron diffusion length of the p-type base region is much longer than the hole diffusion length of the n-type base region. However, it has been limited to fabricate highly efficient n-on-p single-junction GaAs thin film solar cell on a flexible substrate due to technical obstacles. We investigated a simple and fast epitaxial lift-off (ELO) method that uses a stress originating from a Cr/Au bilayer on a 125-μm-thick flexible substrate. A metal combination of AuBe/Pt/Au is employed as a new p-type ohmic contact with which an n-on-p single-junction GaAs thin-film solar cell on flexible substrate was successfully fabricated. The PCE of the fabricated single-junction GaAs thin-film solar cells reached 22.08% under air mass 1.5 global illumination.

摘要

由于薄膜太阳能电池重量轻且具有柔韧性，人们对其开发一直很感兴趣。砷化镓薄膜太阳能电池是薄膜太阳能电池市场上的有力竞争者，因为与其他薄膜太阳能电池相比，它具有较高的功率转换效率（PCE）。砷化镓太阳能电池有两种常见结构：n（发射极）-on-p（基极）和p-on-n。前者表现更好，因为其收集效率高，这是由于p型基极区的电子扩散长度远长于n型基极区的空穴扩散长度。然而，由于技术障碍，在柔性衬底上制造高效的n-on-p单结砷化镓薄膜太阳能电池受到限制。我们研究了一种简单快速的外延剥离（ELO）方法，该方法利用了125μm厚的柔性衬底上Cr/Au双层产生的应力。采用AuBe/Pt/Au金属组合作为新型p型欧姆接触，成功制备了柔性衬底上的n-on-p单结砷化镓薄膜太阳能电池。在空气质量1.5全球光照条件下，制备的单结砷化镓薄膜太阳能电池的功率转换效率达到22.08%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/6db85cbfa3ac/srep30107-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/ffacba325e27/srep30107-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/b33a7d42c9d1/srep30107-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/95ba0f8dc90d/srep30107-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/1cf60d9d5c75/srep30107-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/93e6eb329acd/srep30107-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/6db85cbfa3ac/srep30107-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/ffacba325e27/srep30107-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/b33a7d42c9d1/srep30107-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/95ba0f8dc90d/srep30107-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/1cf60d9d5c75/srep30107-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/93e6eb329acd/srep30107-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6376/4951801/6db85cbfa3ac/srep30107-f6.jpg

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