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使用基于量子点的发光向下转换层改善CuZnSn(S,Se)薄膜太阳能电池的紫外响应

Improving Ultraviolet Responses in CuZnSn(S,Se) Thin-Film Solar Cells Using Quantum Dot-Based Luminescent Down-Shifting Layer.

作者信息

Jeong Woo-Lim, Jang Junsung, Kim Jihun, Joo Soo-Kyung, Park Mun-Do, Kwak Hoe-Min, Baik Jaeyoung, Kim Hyeong-Jin, Kim Jin Hyeok, Lee Dong-Seon

机构信息

School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Korea.

Optoelectronic Convergence Research Center, Department of Materials Science and Engieering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.

出版信息

Nanomaterials (Basel). 2021 Apr 29;11(5):1166. doi: 10.3390/nano11051166.

DOI:10.3390/nano11051166
PMID:33946918
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8145200/
Abstract

Quantum dot (QD)-based luminescent down-shifting (LDS) layers were deposited on CuZnSn(S,Se) (CZTSSe) solar cells via the drop-casting method. The LDS layers can easily widen the narrow absorption wavelength regions of single-junction solar cells and enable improvement of the short-circuit current. The optical properties of LDS layers deposited on glass and containing different QD contents were analyzed based on their transmittance, reflectance, and absorbance. The absorber films to be used in the CZTSSe solar cells were determined by X-ray diffraction measurements and Raman spectroscopy to determine their crystal structures and secondary phases, respectively. The completed CZTSSe solar cells with LDS layers showed increased ultraviolet responses of up to 25% because of wavelength conversion by the QDs. In addition, the impact of the capping layer, which was formed to protect the QDs from oxygen and moisture, on the solar cell performance was analyzed. Thus, a maximal conversion efficiency of 7.3% was achieved with the 1.0 mL QD condition; furthermore, to the best of our knowledge, this is the first time that LDS layers have been experimentally demonstrated for CZTSSe solar cells.

摘要

通过滴铸法将基于量子点（QD）的发光向下转换（LDS）层沉积在铜锌锡（硫，硒）（CZTSSe）太阳能电池上。LDS层可以轻松拓宽单结太阳能电池狭窄的吸收波长区域，并提高短路电流。基于其透射率、反射率和吸光度，分析了沉积在玻璃上且含有不同量子点含量的LDS层的光学性质。分别通过X射线衍射测量和拉曼光谱确定用于CZTSSe太阳能电池的吸收膜的晶体结构和次生相。具有LDS层的完整CZTSSe太阳能电池由于量子点的波长转换，紫外响应提高了25%。此外，还分析了为保护量子点免受氧气和水分影响而形成的盖帽层对太阳能电池性能的影响。因此，在1.0 mL量子点条件下实现了7.3%的最大转换效率；此外，据我们所知，这是首次在实验中证明LDS层可用于CZTSSe太阳能电池。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/201d257fa88e/nanomaterials-11-01166-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/548bec237f40/nanomaterials-11-01166-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/60c85e31c442/nanomaterials-11-01166-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/5be56301e754/nanomaterials-11-01166-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/b9ca05939f4c/nanomaterials-11-01166-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/5ed494f7e66a/nanomaterials-11-01166-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/201d257fa88e/nanomaterials-11-01166-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/548bec237f40/nanomaterials-11-01166-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/f7ba5c621d8b/nanomaterials-11-01166-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/6d12199aef51/nanomaterials-11-01166-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/60c85e31c442/nanomaterials-11-01166-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/5be56301e754/nanomaterials-11-01166-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/b9ca05939f4c/nanomaterials-11-01166-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/5ed494f7e66a/nanomaterials-11-01166-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e241/8145200/201d257fa88e/nanomaterials-11-01166-g008.jpg

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Device Postannealing Enabling over 12% Efficient Solution-Processed Cu ZnSnS Solar Cells with Cd Substitution.通过镉替代实现超过12%效率的溶液法制备的铜锌锡硫太阳能电池的器件后退火处理
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