通过重组控制,提高量子点敏感太阳能电池的功率转换效率超过8%
Ke Zhao1, Zhenxiao Pan1, Iván Mora-Seró2
1†Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China.
Journal of the American Chemical Society
|April 11, 2015
概括
一种新的顺序ZnS/SiO2双层处理显著降低了量子点敏感太阳能电池 (QDSC) 中的电荷重组. 这提高了QDSC功率转换效率,提高了电池的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 纳米技术纳米技术
背景情况:
- 量子点敏感太阳能电池 (QDSC) 由于电荷重组而面临功率转换效率的限制.
- 改善电荷收集和抑制重组对于推进QDSC技术至关重要.
研究的目的:
- 为了研究QD光电极的新型序列无机ZnS/SiO2双层处理.
- 通过抑制界面重组来提高QDSC中的功率转换效率和稳定性.
主要方法:
- 在QD敏感的光电极上应用一个连续的ZnS/SiO2双层处理.
- 使用理论建模,阻抗光谱学和亚平秒THz光谱学.
- 制造和性能测试的CdSe(x) Te(1-x) QDSCs.s.
主要成果:
- S/SiO2处理有效地抑制了界面重组,并提高了电荷收集效率.
- THz光谱证实了氧化物表面的减少回归重组,而不会影响QD到TiO2的电子转移.
- CdSe(x) Te(1-x) QDSCs获得了8.21% (8.55%冠军细胞) 的认证记录效率.
结论:
- 连续的ZnS/SiO2双层处理是提高QDSC性能的一个非常有效的策略.
- 这种方法比以前的方法有了显著的改进,效率提高了20%.
- 该处理还为QDSCs提供了增强的操作稳定性.
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