Tuning the work function of indium-tin-oxide electrodes for low-temperature-processed, titanium-oxide-free perovskite solar cells
Tuning the work function of indium-tin-oxide electrodes for low-temperature-processed, titanium-oxide-free perovskite solar cells
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DOI：
10.1016/j.orgel.2017.02.011
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发表时间：
2017-05
影响因子：
3.2
通讯作者：
Xiaoyin Xie;Guanchen Liu;Chongyang Xu;Shuang Li;Zhihai Liu;Eun-Cheol Lee
中科院分区：
文献类型：
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作者：
Xiaoyin Xie;Guanchen Liu;Chongyang Xu;Shuang Li;Zhihai Liu;Eun-Cheol Lee
在这项工作中，低温处理，钛氧化物的钙钛矿太阳能电池（PSC）的功率转换效率（12.2%）与钛氧化物为基础的PSC相比。由于钙钛矿薄膜的两步制备方法，所制备的PSC表现出较小的滞后。使用聚[（9，9-双（3 '-（N，N-二甲基氨基）丙基）-2，7-芴）-alt-2，7-（9，9-二辛基芴）]（PFN）调谐的氧化铟锡（ITO）电极作为阴极，使用苯基-C61-丁酸甲酯（PCBM）作为电子传输层。由于表面偶极子的形成，ITO电极的功函数可以从−4.75 eV调整到−4.12 eV，这对于电子收集更有效。我们提出的方法将PSC加工温度从500 °C显著降低到100 °C，这对于PSC的商业化和柔性PSC的制造是有利的。
In this work, low-temperature-processed, titanium-oxide-free perovskite solar cells (PSCs) with power conversion efficiency (12.2%) comparable to that of titanium-oxide-based PSCs were fabricated. The fabricated PSCs exhibited a small hysteresis owing to the two-step preparation method employed for perovskite films. A poly [(9,9-bis(3’-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN)-tuned indium-tin-oxide (ITO) electrode was employed as a cathode and phenyl-C61-butyric acid methyl ester (PCBM) was used as an electron transport layer. Owing to the formation of surface dipoles, the work function of the ITO electrode could be tuned from −4.75 eV to −4.12 eV, which is more efficient for electron collection. Our proposed method significantly lowers the PSC processing temperature from 500 °C to 100 °C, which is advantageous for commercialization of PSCs and fabrication of flexible PSCs.