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在9,10-Bis (乙) 甲薄膜中单片裂变
Youn Jue Bae1, Gyeongwon Kang1, Christos D Malliakas1
1Department of Chemistry and Institute for Sustainability and Energy at Northwestern , Northwestern University , Evanston , Illinois 60208-3113 , United States.
Journal of the American Chemical Society
|October 30, 2018
概括
单片裂变 (SF) 将一个高能激子转化为两个低能三胞胎,提高太阳能电池的效率. 研究人员在BPEA薄膜中发现了高效的SF,
科学领域:
- 材料科学
- 摄影化学
- 有机电子
背景情况:
- 单片裂变 (SF) 是将单片激子转化为两个三片激子的过程,提高了太阳能电池的效率.
- 现有的SF材料往往缺乏稳定性,并且具有较低的三重能量,限制了它们在设备中的使用.
- 有机染色体是开发高效太阳能转化技术的关键.
研究的目的:
- 调查 9,10-bis-乙烯 (BPEA) 在单片裂变应用中的潜力.
- 分析聚晶BPEA薄膜中的SF效率和动力学.
- 评估BPEA作为提高太阳能电池性能的一种候选产品.
主要方法:
- 聚晶BPEA薄膜的表征
- 用光谱分析来确定单元和三元的能量.
- 测量SF速率的动力学研究 (kSFA和kSFB).
- 三重产量的确定.
主要成果:
- 在BPEA多晶薄膜中观察到有效的单片裂变.
- 在固态状态下,BPEA具有高单电位 (2.40 eV) 和三电位 (1.11 eV) 的能量.
- 两种BPEA多态 (C2/c和Pbcn) 显示出不同的SF速率:kSFA = (109 ± 4 ps) -1 和kSFB = (490 ± 10 ps) -1.
- 测定了180 ± 20%的高三倍产量.
结论:
- 9,10-bis-乙烯 (BPEA) 在多晶薄膜中显示出高效的单片裂变.
- 高三倍能和高效的SF工艺使BPEA成为下一代太阳能电池的有希望的材料.
- BPEA的特性表明,它有可能提高实际设备中的太阳能转换效率.
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