【作者】 张为海； 刘维尔； 熊娟； 顾豪爽； 王贤保； 李金华；

【Author】 Weihai Zhang;Weier Liu;Juan Xiong;Haoshuang Gu;Xianbao Wang;Jinhua Li;Faculty of Physics & Electronic Science and School of Materials Science and Engineering,University of Hubei;

【机构】 湖北大学物理与电子科学学院及材料科学与工程学院；

【摘要】 近年来,钙钛矿太阳能电池得到了飞速的发展,其效率已由最开始的3.8%^[1]提高到20.1%^[2]。然而,高效电池均采用金属氧化物介孔结构,电池的制备过程需要450℃以上的环境下退火。我们采用ZnO纳米晶薄膜作为电子传输层,在空气中用低温工艺制备了效率高达15.89%的平面钙钛矿电池。如图Fig.1（a）所示,电池开路电压、电流密度和填充因子分别为1.09V、22.57 mA/cm²和64.2%,其效率高达15.89%。图Fig.1（b）展示了IPCE图谱,其光电转换效率在400-750 nm波段内均保持在80-90%之间,积分电流密度为21.5 mA/cm²与测试结果22.57 mA/cm²相吻合。而且,钙钛矿制作的所有过程均是在空气中完成,即使在相对湿度超过65%的环境下也能得到效率较高的电池。更多还原

【Abstract】 Perovskite solar cells（PSCs） have the great progress in recent years. The highest power conversion efficiency（PCE） is beyond 20%. However, most high-efficiency PSCs adopted the structures of mesoporous TiO₂ which required processing temperatures of up to 450℃. Here, we fabricated the PSCs with the high efficiency of 15.89% by using Zn O nano-particle as the electronic transport layer（ETL） at a low-temperature in ambient. As shown in Figure 1, open circuit voltage(V_oc), short circuit current density(J_sc) and fill factor of the PSC are 1.09 V, 22.57 m A/cm² and 64.2%, respectively. The incident photo-to-current efficiency could be beyond 80% in the wavelength range of 400 nm- 800 nm. The integrated J_sc of 21.5 mA/cm² coincided with the measured results in the experiment. More importantly, the whole processing of PSCs could be done in ambient. Even if the relative humidity was beyond 65% the high efficient PSCs could also be obtained.更多还原