协奏组有机太阳能电池,效率为20.6%,可通过减少电压损失来实现
Jianqiu Wang1,2, Zhong Zheng1,3, Pengqing Bi1
1State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
National science review
|July 14, 2023
概括
研究人员通过添加一种新的分子来减少电压损失,开发出高效的有机太阳能电池 (OSC). 这一突破取得了创纪录的20.6%的功率转换效率,并联OSCs.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 有机太阳能电池 (OSCs) 在实现高效率方面面临重大挑战,原因是电压损失很大.
- 尽量减少能量干扰和非辐射电压损失对于提高OSC性能至关重要.
研究的目的:
- 通过减少电压损失来提高有机太阳能电池的效率.
- 研究引入非对称小分子接受器 (AITC) 进入三元系统的影响.
- 为了在单接口和并联OSC配置中实现创纪录的功率转换效率.
主要方法:
- 通过将AITC纳入PBDB-T:BTP-eC9系统,构建三元有机太阳能电池.
- 在AITC添加后对形态变化的分析,包括域大小和结晶度.
- 使用优化的三元活性层制造并联OSC的制造和表征.
主要成果:
- 添加AITC有效地减少了三元系统中的能量扰乱和非辐射电压损失.
- 观察到形态上的改善,如调整的域大小和增加的结晶度.
- 三元的OSC实现了电力转换效率为19.1% (认证为18.9%).
- 结合三元活性层的Tandem OSCs实现了创纪录的20.3% (输出20.6%) 的认证效率.
结论:
- 三元策略有效地同时降低了OSC中的能量障碍和非辐射电压损失.
- 使用优化的三元活性层构建协同架构是实现高光伏性能的可行方法.
- 这项工作为有机太阳能电池领域的效率设定了新的基准.
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