Sun Haoxuan, Deng Kaimo, Jiang Yu, Ni Jiangfeng, Xiong Jie, Li Liang
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
School of Physical Science and Technology, Jiangsu Key Laboratory of Thin Films, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, 215006, P. R. China.
Small. 2020 Mar;16(10):e1906681. doi: 10.1002/smll.201906681. Epub 2020 Feb 12.
As the fastest developing photovoltaic device, perovskite solar cells have achieved an extraordinary power conversion efficiency (PCE) of 25.3% under AM 1.5 illumination. However, few studies have been devoted to perovskite solar cells harvesting artificial light, owing to the great challenge in the simultaneous manipulation of bandgap-adjustable perovskite materials, corresponding matched energy band structure of carrier transport materials, and interfacial defects. Herein, through systematic morphology, composition, and energy band engineering, high-quality Cs MA PbBr I perovskite as the light absorber and Nb Ti O (Nb:TiO ) as the electron transport material with an ideal energy band alignment are obtained simultaneously. The theoretical-limit-approaching record PCEs of 36.3% (average: 34.0 ± 1.2%) under light-emitting diode (LED, warm white) and 33.2% under fluorescent lamp (cold white) are achieved simultaneously, as well as a PCE of 19.5% (average: 18.9 ± 0.3%) under solar illumination. An integrated energy conversion and storage system based on an artificial light response solar cell and sodium-ion battery is established for diverse practical applications, including a portable calculator, quartz clock, and even environmental monitoring equipment. Over a week of stable operation shows its great practical potential and provides a new avenue to promote the commercialization of perovskite photovoltaic devices via integration with ingenious electronic devices.
作为发展最快的光伏器件，钙钛矿太阳能电池在AM 1.5光照下已实现了25.3%的卓越功率转换效率（PCE）。然而，由于在同时调控带隙可调的钙钛矿材料、载流子传输材料相应匹配的能带结构以及界面缺陷方面面临巨大挑战，很少有研究致力于钙钛矿太阳能电池收集人造光。在此，通过系统的形貌、组成和能带工程，同时获得了高质量的CsMA PbBrI钙钛矿作为光吸收体以及具有理想能带排列的NbTiO（Nb:TiO）作为电子传输材料。在发光二极管（LED，暖白色）下实现了接近理论极限的创纪录PCE为36.3%（平均值：34.0±1.2%），在荧光灯（冷白色）下为33.2%，以及在太阳光照射下PCE为19.5%（平均值：18.9±0.3%）。基于人工光响应太阳能电池和钠离子电池建立了一个集成的能量转换和存储系统，用于多种实际应用，包括便携式计算器、石英钟甚至环境监测设备。超过一周的稳定运行展示了其巨大的实际潜力，并为通过与巧妙的电子设备集成来推动钙钛矿光伏器件商业化提供了一条新途径。
