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An ammonia-free chemical-bath-deposited ZnS(O,OH) buffer layer for flexible Cu(In,Ga)Se2 solar cell application: an eco-friendly approach to achieving improved stability
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yeh, Tzu-Hsuan Hsu, Chia-Hao Ho, Wei-Hao Wei, Shih-Yuan Lai, Chih-Huang |
| Copyright Year | 2016 |
| Abstract | A low-cost, environmentally friendly process of chemical-bath-deposited (CBD) ZnS(O,OH) buffer layers for flexible Cu(In,Ga)Se2(CIGS)-based solar cells is reported. Unlike the conventional CdS buffer layers, in which toxic cadmium and ammonia are used, our CBD-ZnS(O,OH) buffer layer is fabricated without the addition of ammonia or other complexing agents. The ammonia-free ZnS(O,OH) buffer layer is robust under light illumination so the metastabilities in the device characteristics (the so-called light-soaking effect), typically observed in CIGS/CBD-ZnS(O,OH) solar cells, are eliminated. To further adjust the composition of the ammonia-free CBD ZnS(O,OH) buffer layer, we employed an oxygen plasma post-treatment so that the oxygen content of the CBD buffer layer could be controlled in a straightforward way and the conduction band offset at the CIGS/ZnS(O,OH) interface could be engineered. Significantly reduced series resistance was observed after optimizing the oxygen content, leading to 10.1% cell efficiency. Our ammonia-free process demonstrates a comparable efficiency to the conventional process but without any light soaking. |
| Starting Page | 5212 |
| Ending Page | 5218 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C6GC01293K |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/gc/c6gc01293k/c6gc01293k1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C6GC01293K |
| Volume Number | 18 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
