...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Organic Electronics >Enhancing photovoltaic performance of inverted perovskite solar cells via imidazole and benzoimidazole doping of PC_(61)BM electron transport layer
【24h】

Enhancing photovoltaic performance of inverted perovskite solar cells via imidazole and benzoimidazole doping of PC_(61)BM electron transport layer

机译：通过PC_（61）BM电子传输层的咪唑和苯并咪唑掺杂增强反钙钛矿太阳能电池的光伏性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Although [6,6]-phenyl-C_(61)-butyric acid methyl ester (PC_(61)BM) has been widely used as electron transport layer (ETL) for inverted perovskite solar cells (PeSCs), it still remains to be improved. Herein, we report that amphoteric imidazole (IZ) and benzimidazole (BIZ) can act as effective and multifunctional dopants for PC_(61)BM-based ETL. The resultant MAPbI_3-xCl_3-based PeSCs outperform the devices with pristine PC_(61)BM ETL with power conversion efficiency (PCE) significantly improved from 14.38% to 15.62/16.47%. Detailed mechanism studies demonstrate that IZ and BIZ-doping cause remarkable reduction of ETL surface roughness and significant increase in electrical conductivity of ETL, both of which facilitate the electron transport from perovskite (PVK) and Ag cathode. More importantly, IZ and BIZ as dopants may passivate both Lewis-acid and Lewis-base type defects on the PVK surface due to their amphoteric nature. DFT computations further reveal that BIZ is a better Lewis-base and Lewis-acid than IZ due to its larger π-conjugation, which thus makes it a superior dopant over IZ. In addition, the PeSCs with PC_(61)BM:BIZ based ETL display enhanced device stability by retarding the I~- anion migration from PVK to Ag cathode.
机译：尽管[6,6]-苯基-C_（61）-丁酸甲酯（PC_（61）BM）已被广泛用作反钙钛矿太阳能电池（PeSCs）的电子传输层（ETL），但仍有待进一步研究。改善。本文中，我们报道了两性咪唑（IZ）和苯并咪唑（BIZ）可以作为基于PC_（61）BM的ETL的有效多功能掺杂剂。所得的基于MAPbI_3-xCl_3的PeSC优于具有原始PC_（61）BM ETL的器件，其功率转换效率（PCE）从14.38％显着提高至15.62 / 16.47％。详细的机理研究表明，IZ和BIZ掺杂会显着降低ETL表面粗糙度并显着提高ETL的电导率，这两者都促进了钙钛矿（PVK）和Ag阴极的电子传输。更重要的是，由于IZ和BIZ的两性性质，它们可以钝化PVK表面的Lewis酸和Lewis碱型缺陷。 DFT计算进一步表明，由于BIZ具有更大的π共轭，因此BIZ比IZ具有更好的Lewis碱和Lewis酸，因此它比IZ更好。此外，基于PC_（61）BM：BIZ的ETL的PeSCs通过阻止离子从PVK迁移到Ag阴极而显示出增强的器件稳定性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号