无铅钙钛矿太阳能电池的曙光：高度稳定的双钙钛矿CsAgBiBr薄膜。
The Dawn of Lead-Free Perovskite Solar Cell: Highly Stable Double Perovskite CsAgBiBr Film.
作者信息
Wu Cuncun, Zhang Qiaohui, Liu Yang, Luo Wei, Guo Xuan, Huang Ziru, Ting Hungkit, Sun Weihai, Zhong Xinrui, Wei Shiyuan, Wang Shufeng, Chen Zhijian, Xiao Lixin
机构信息
Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing 100871 P. R. China.
Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices Chongqing University of Arts and Sciences Yongchuan Chongqing 402160 P. R. China.
出版信息
Adv Sci (Weinh). 2017 Dec 18;5(3):1700759. doi: 10.1002/advs.201700759. eCollection 2018 Mar.
Recently, lead-free double perovskites have emerged as a promising environmentally friendly photovoltaic material for their intrinsic thermodynamic stability, appropriate bandgaps, small carrier effective masses, and low exciton binding energies. However, currently no solar cell based on these double perovskites has been reported, due to the challenge in film processing. Herein, a first lead-free double perovskite planar heterojunction solar cell with a high quality CsAgBiBr film, fabricated by low-pressure assisted solution processing under ambient conditions, is reported. The device presents a best power conversion efficiency of 1.44%. The preliminary efficiency and the high stability under ambient condition without encapsulation, together with the high film quality with simple processing, demonstrate promise for lead-free perovskite solar cells.
最近，无铅双钙钛矿因其固有的热力学稳定性、合适的带隙、较小的载流子有效质量和较低的激子结合能，已成为一种有前景的环境友好型光伏材料。然而，由于薄膜制备方面的挑战，目前尚未有基于这些双钙钛矿的太阳能电池的报道。在此，报道了一种通过在环境条件下低压辅助溶液法制备的、具有高质量CsAgBiBr薄膜的首个无铅双钙钛矿平面异质结太阳能电池。该器件的最佳功率转换效率为1.44%。初步的效率以及在无封装环境条件下的高稳定性，再加上简单制备工艺所带来的高质量薄膜，展示了无铅钙钛矿太阳能电池的前景。
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