Hole Transport Bilayer for Highly Efficient and Stable Inverted Perovskite Solar Cells
Hole Transport Bilayer for Highly Efficient and Stable Inverted Perovskite Solar Cells
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DOI：
10.1021/acsaem.0c01806
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发表时间：
2021-01-25
影响因子：
6.4
通讯作者：
Venkataraman, D.
中科院分区：
文献类型：
--
作者：
Javaid, Hamza;Duzhko, Volodimyr V.;Venkataraman, D.
我们证明了使用由聚[双（4-苯基）（2,4,6-三甲基苯基）胺]（PTAA）和CuI组成的空穴传输双层膜可以产生高效和稳定的倒置，即p-i-n，钙钛矿太阳能电池（PSCs）。基于双层结构的器件平均功率转换效率（PCE）为19.4%，最大PCE为20.34%。相比之下，具有单个PTAA中间层的器件的平均PCE为17.7%。在PTAA/CuI双层上制备的钙钛矿薄膜结晶度提高，晶粒尺寸增大。来自紫外光电子能谱和Mott-Schottky阻抗分析的数据表明，器件内的内置电位增加，CuI界面处的向上带弯曲增强。双层HTL器件具有最小的电流-电压迟滞和最大功率点稳定的电流输出。这些器件在惰性气氛下的环境光下稳定超过4500小时。
We demonstrate that using a hole transport bilayer composed of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) and CuI leads to highly efficient and stable inverted, that is, p-i-n, perovskite solar cells (PSCs). The bilayer-based devices had an average power conversion efficiency (PCE) of 19.4% and a maximum PCE of 20.34%. In comparison, devices with a single PTAA interlayer showed an average PCE of 17.7%. Perovskite films fabricated on PTAA/CuI bilayers showed improved crystallinity and larger grain sizes. Data from ultraviolet photoelectron spectroscopy and Mott-Schottky analysis of impedance suggest an increased built-in potential within the device with enhanced upward band bending at the CuI interface. The bilayered HTL devices have minimum current-voltage hysteresis and stable current output at the maximum power point. These devices were stable for more than 4500 h under ambient light in an inert atmosphere.