Spectrum-Dependent Spiro-OMeTAD Oxidization Mechanism in Perovskite Solar Cells.
Spectrum-Dependent Spiro-OMeTAD Oxidization Mechanism in Perovskite Solar Cells.
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DOI：
10.1021/acsami.5b07703
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发表时间：
2015-10
影响因子：
9.5
通讯作者：
Shen Wang;Wen Yuan;Y. Meng
中科院分区：
文献类型：
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作者：
Shen Wang;Wen Yuan;Y. Meng
我们提出了一种光谱依赖的机制，用于2，2 '，7，7'-四（N，N-二-对甲氧基苯胺）-9，9 '-螺二芴（Spiro-OMeCl 4）与双（三氟甲烷）磺酰亚胺锂盐（LiTFSI）的氧化，这是常用的钙钛矿太阳能电池作为空穴传输层。钙钛矿层在不同光谱范围的螺-OMeO 2氧化中起不同的作用。观察并表征了氧化的螺-OMeCl 4对太阳能电池性能的影响。在初始长波长照射（>450 nm）下，由于较高量的氧化的Spiro-OMeCl 2，在TiO 2/Spiro-OMeCl 2界面处的电荷复合增加。另一方面，Spiro-OMeAl 2 O3层的电导率增加和Au/Spiro-OMeAl 2 O3界面处的电荷转移增强促进了太阳能电池的性能。
We propose a spectrum-dependent mechanism for the oxidation of 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (Spiro-OMeTAD) with bis(trifluoromethane)sulfonimide lithium salt (LiTFSI), which is commonly used in perovskite solar cells as the hole transport layer. The perovskite layer plays different roles in the Spiro-OMeTAD oxidization for various spectral ranges. The effect of oxidized Spiro-OMeTAD on the solar cell performance was observed and characterized. With the initial long-wavelength illumination (>450 nm), the charge recombination at the TiO2/Spiro-OMeTAD interface was increased due to the higher amount of the oxidized Spiro-OMeTAD. On the other hand, the increased conductivity of the Spiro-OMeTAD layer and enhanced charge transfer at the Au/Spiro-OMeTAD interface facilitated the solar cell performance.