Reduction and oxidation of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) induced by methylamine (CH3NH2)-containing atmosphere for perovskite solar cells
Reduction and oxidation of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) induced by methylamine (CH3NH2)-containing atmosphere for perovskite solar cells
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含甲胺（CH3NH2）气氛诱导的聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸）的还原和氧化用于钙钛矿太阳能电池
DOI：
10.1039/c6ta00488a
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发表时间：
2016-03
影响因子：
11.9
通讯作者：
Zhou Yinhua
中科院分区：
文献类型：
--
作者：
Liu Tiefeng;Jiang Fangyuan;Tong Jinhui;Qin Fei;Meng Wei;Jiang Youyu;Li Zaifang;Zhou Yinhua
由于其高的功率转换效率和低成本的加工，Percent太阳能电池已经吸引了很多关注。然而，装置的可再现性一直是个问题。制造气氛被认为是可能的原因之一。到目前为止，还缺乏直接的证据来证明哪种气氛以及气氛如何影响设备性能。在这里，我们报告了用于合成甲基碘化铵（MAI）的甲胺（MA，沸点：-6 °C）可以化学还原PEDOT：PSS空穴传输层。还原后，在400-1100 nm处出现强吸收带，电导率和功函数同时降低。此外，还发现MA还原的PEDOT：PSS膜在空气中容易被氧化。PEDOT：PSS层的功函数降低导致空穴收集不良，并产生钙钛矿太阳能电池的低开路电压、短路电流和功率转换效率。因此，尽管含MA蒸气的制造气氛对其中底部电极收集电子的基于TiO 2的钙钛矿太阳能电池的性能是有益的，但它对基于PEDOT：PSS的太阳能电池的性能是有害的。
Perovskite solar cells have been attracting a lot of attention because of their high power conversion efficiency and low-cost processing. However, device reproducibility has been a problem. The fabrication atmosphere is regarded as one of the possible reasons. So far, there has been a lack of direct evidence to prove which kind of atmosphere and how the atmosphere affects the device performance. Here, we report that the methylamine (MA, boiling point: −6 °C) that is used to synthesize the methylammonium iodide (MAI) could chemically reduce the PEDOT:PSS hole-transporting layer. After the reduction, a strong absorbance band appears at 400–1100 nm and the conductivity and work function simultaneously decrease. Furthermore, the MA-reduced PEDOT:PSS films are also found to be easily oxidized in air. The reduced work function of the PEDOT:PSS layer leads to poor hole collection and yields low open-circuit voltage, short-circuit current and power conversion efficiency of the perovskite solar cells. Therefore, though the MA vapor-containing fabrication atmosphere is beneficial to the performance of TiO2-based perovskite solar cells in which the bottom electrode collects the electrons, it is detrimental to that of PEDOT:PSS-based solar cells.
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影响因子：
--
作者：
Yijie Xia;K. Sun;Jingjing Chang;Jianyong Ouyang
通讯作者：
Yijie Xia;K. Sun;Jingjing Chang;Jianyong Ouyang
影响因子：
16.6
作者：
Xiao, Manda;Huang, Fuzhi;Spiccia, Leone
通讯作者：
Spiccia, Leone
影响因子：
4.4
作者：
Tomas Johansson;L. Pettersson;O. Inganäs
通讯作者：
Tomas Johansson;L. Pettersson;O. Inganäs
影响因子：
29.4
作者：
Berry, Joseph;Buonassisi, Tonio;Cahen, David
通讯作者：
Cahen, David
影响因子：
15
作者：
Ahn, Namyoung;Son, Dae-Yong;Park, Nam-Gyu
通讯作者：
Park, Nam-Gyu