Hysteresis-less mesoscopic CH3NH3Pbl3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode
Hysteresis-less mesoscopic CH3NH3Pbl3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode
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DOI：
10.1016/j.nanoen.2015.05.014
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发表时间：
2015-07-01
期刊：
影响因子：
17.6
通讯作者：
Im, Sang Hyuk
中科院分区：
文献类型：
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作者：
Heo, Jin Hyuck;You, Myoung Sang;Im, Sang Hyuk
相对于扫描方向的大电流密度-电压（J-V）滞后是钙钛矿混合太阳能电池中的重要问题，因为功率转换效率有时是不正确的。在这里，我们展示了>17%介观CH（3）NH（3）Pbl（3）（MAPbl（3））钙钛矿混合太阳能电池，其相对于扫描方向没有显著的J-V滞后，并且通过使用Li处理的介观TiO 2电极进行评级。Li处理的介观TiO 2电极改善了从MAPb 1（3）到介观TiO 2的电荷分离/注入、介观TiO 2中的电荷传输和表面陷阱，因为介观TiO 2的导带边缘降低了约0.1eV，电荷载流子的迁移率从近似1.1 × 10（-6）cm（2）/ Vs增加到近似2.5 × 10（-6）cm（2）/Vs，介观TiO 2的电导率从近似5.6 × 10（-7）S/cm增加到近似1.6 × 10（-6）S/cm，经Li处理后，陷阱密度从1.2 × 10 ~（16）cm ~（-3）降至9.3 × 10 ~（15）cm ~（-3）。因此，平均功率转换效率显着提高，从14.84%至17.26%，在1太阳条件下，由Li处理的介观二氧化钛。(C)2015爱思唯尔有限公司版权所有。
A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH(3)NH(3)Pbl(3) (MAPbl(3)) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbl(3) into mesoscopic TiO2, charge transport in mesoscopic TiOz, and surface traps because the conduction band edge of mesoscopic TiOz was lowered by similar to 0.1 eV, the mobility of charge carriers was increased from similar to 1.1 x 10(-6) cm(2)/ Vs to similar to 2.5 x 10(-6) cm(2)/Vs, the conductivity of mesoscopic TiO2 was increased from similar to 5.6 x 10(-7) S/cm to similar to 1.6 x 10(-6)S/cm, and the trap density was reduced from similar to 1.2 x 10(16) cm(-3) to similar to 9.3 x 10(15) cm(-3) through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1 sun condition by the Li-treatment of mesoscopic TiO2. (C) 2015 Elsevier Ltd. All rights reserved.