Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells
Ultrathin Cu2O as an efficient inorganic hole transporting material for perovskite solar cells
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超薄 Cu2O 作为钙钛矿太阳能电池的高效无机空穴传输材料
DOI：
10.1039/c5nr07758c
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发表时间：
2016
期刊：
影响因子：
6.7
通讯作者：
Wu Tao Tom
中科院分区：
文献类型：
--
作者：
Yu Weili;Li Feng;Wang Hong;Alarousu Erkki;Chen Yin;Lin Bin;Wang Lingfei;Hedhili Mohamed Nejib;Li Yangyang;Wu Kewei;Wang Xianbin;Mohammed Omar F.;Wu Tao Tom
我们证明了用简单的热氧化方法制备的超薄P型Cu2O薄膜可以作为一种很有前途的钙钛矿太阳能电池的空穴传输材料。采用两步法制备了钙钛矿型无机-有机杂化太阳能电池，电池的功率转换效率为11.0%。我们发现，为了获得最佳的太阳电池性能，必须精确地调节Cu2O层的厚度和性质。这种钙钛矿型太阳能电池的良好性能归功于超薄Cu2O的独特性质，包括高空穴迁移率，与CH3NH3PbI3良好的能级对准，以及较长的光激发载流子寿命。热氧化法制备的超薄Cu2O薄膜结合了低成本、易制备和高器件性能的优点，有望促进钙钛矿型太阳能电池的工业化发展。
We demonstrate that ultrathin P-type Cu2O thin films fabricated by a facile thermal oxidation method can serve as a promising hole-transporting material in perovskite solar cells. Following a two-step method, inorganic–organic hybrid perovskite solar cells were fabricated and a power conversion efficiency of 11.0% was achieved. We found that the thickness and properties of Cu2O layers must be precisely tuned in order to achieve the optimal solar cell performance. The good performance of such perovskite solar cells can be attributed to the unique properties of ultrathin Cu2O, including high hole mobility, good energy level alignment with CH3NH3PbI3, and longer lifetime of photo-excited carriers. Combining the merits of low cost, facile synthesis, and high device performance, ultrathin Cu2O films fabricated via thermal oxidation hold promise for facilitating the developments of industrial-scale perovskite solar cells.