在低维矿光伏中对量子井宽度分布和载体迁移的合成控制
Andrew H Proppe1,2, Rafael Quintero-Bermudez2, Hairen Tan2
1Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario, Canada , M5S 3G4.
Journal of the American Chemical Society
|February 6, 2018
概括
通过缩小量子井分布,提高低维矿太阳能电池的稳定性和性能. 这导致了电荷载体扩散的增强和更高的功率转换效率 (PCE).
科学领域:
- 材料科学
- 太阳能发电
- 纳米技术
背景情况:
- 金属化物矿具有高光伏效率,但存在不稳定性.
- 具有有机配体的低维石通过形成量子井 (QW) 来提高稳定性.
- 薄膜中的QW宽度分布导致带隙变化并限制性能.
研究的目的:
- 在低尺寸的矿中实现对QW宽度分布的精细控制.
- 调查QW宽度对光伏性能的影响.
- 提高矿太阳能电池的稳定性和效率.
主要方法:
- 使用作为配体来缩小QW宽度分布.
- 制造基于的矿量子井 (PQW) 太阳能电池.
- 使用混合子策略优化PQW设备.
- 在环境条件下评估装置的稳定性.
主要成果:
- 联体导致QW宽度分布较窄.
- 电子和孔的扩散长度分别增加了1.4×和1.9×.
- 的功率转换效率 (PCE) 提高到14. 4%,而其他配体的效率为11-12%.
- 优化设备在650小时后实现了16.5%的PCE,并保持了90%的效率.
结论:
- 联体显著提高了PQW太阳能电池的稳定性和性能.
- 较窄的QW分布导致增强的电荷传输和更高的PCE.
- 这些发现为更稳定,更高效的矿光伏开辟了道路.
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