通过二次沉积提高量子点敏感太阳能电池的效率超过15%
Han Song1,2, Yu Lin1,2, Zhengyan Zhang1,2
1Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.
一种新的方法通过创建没有新的重组中心的吸附点来提高量子点敏感太阳能电池 (QDSC) 的量子点负载. 这提高了QDSC的性能,达到15.20%的认证记录功率转换效率 (PCE).
科学领域:
- 材料科学
- 可再生能源
- 纳米技术
背景情况:
- 低量子点 (QD) 负载是量子点敏感太阳能电池 (QDSC) 性能的一个关键限制.
- 现有的二次沉积方法改善了QD负载,但引入了重组中心,阻碍了光伏和填充因子的增强.
研究的目的:
- 开发一种新的QD二次沉积方法,在不引入新的重组中心的情况下增加QD负载.
- 通过提高光电流,光电压和充电因子来提高QDSC的整体性能.
主要方法:
- 开发了一种方便的二次沉积方法,在QD过敏光电极上形成金属氧化层,以创建新的吸附点.
- 用MgCl2溶液处理用于Zn-Cu-In-S-Se (ZCISSe) QD敏感的TiO2膜电极作为一个模型系统.
- 这种方法成功地将另外38%的QD固定为单一层.
主要成果:
- 二次沉积方法显著增加了QD负载和光采集能力.
- 电荷重组减少,导致光电流,光电压和充电因子显著提高.
- ZCISSe QDSC的平均功率转换效率 (PCE) 从13.54%提高到15.31%,液体接头QDSC的PCE达到15.20%.
结论:
- 开发的QD二次沉积策略有效地提高了QD负载和太阳能电池的性能.
- 通过克服以前的局限性,该方法为推进QDSC技术提供了有前途的途径.
- 实现新的认证PCE记录突显了这种方法在有效的太阳能转换方面的潜力.
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