Impact of the Electron-Transport Layer on the Performance of Solution-Processed Small-Molecule Organic Solar Cells
Impact of the Electron-Transport Layer on the Performance of Solution-Processed Small-Molecule Organic Solar Cells
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电子传输层对溶液处理小分子有机太阳能电池性能的影响
DOI：
10.1002/cssc.201402171
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发表时间：
2014
期刊：
影响因子：
8.4
通讯作者：
Chen Yongsheng
中科院分区：
文献类型：
--
作者：
Long Guankui;Wan Xiangjian;Kan Bin;Hu Zhicheng;Yang Xuan;Zhang Yi;Zhang Mingtao;Wu Hongbing;Huang Fei;Su Shijian;Cao Yong;Chen Yongsheng
虽然最近通过对相同材料的不同夹层进行仔细优化，聚合物太阳能电池的性能得到了显着改善，但小分子太阳能电池在这方面需要更多的改进，特别是电子传输层（ETL）。在这项工作中，研究了三种不同的溶液处理的ETL，PFN，ZnO纳米颗粒和LiF，并在小分子器件的性能方面进行了比较，分别实现了8.32，7.30和7.38%的功率转换效率（PCE）。已经研究了ETL诱导增强的机制，不同的ETL对器件性能具有显著不同的影响。PFN的明显改善的性能归因于减少的双分子复合和增加的有效光子吸收在活性层中的组合。
Although the performance of polymer solar cells has been improved significantly recently through careful optimization with different interlayers for the same materials, more improvement is needed in this respect for small‐molecule‐based solar cells, particularly for the electron‐transport layers (ETLs). In this work, three different solution‐processed ETLs, PFN, ZnO nanoparticles, and LiF, were investigated and compared in the performance of small‐molecule‐based devices, and power conversion efficiencies (PCEs) of 8.32, 7.30, and 7.38 % were achieved, respectively. The mechanism for the ETL‐induced enhancement has been studied, and different ETLs have a significantly different impact on the device performance. The clearly improved performance of PFN is attributed to the combination of reduced bimolecular recombination and increased effective photon absorption in the active layer.