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Hysteresis-less mesoscopic CH(3)NH(3)Pbl(3) perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode
- Hysteresis-less mesoscopic CH(3)NH(3)Pbl(3) perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode
- Heo, Jin Hyuck; You, Myoung Sang; Chang, Min Hyuk; Yin, Wenping; Ahn, Tae Kyu; Lee, Sang-Ju; Sung, Shi-Joon; Kim, Dae Hwan; Im, Sang Hyuk
- DGIST Authors
- Sung, Shi-Joon; Kim, Dae Hwan
- Issue Date
- Nano Energy, 15, 530-539
- Article Type
- Average Power; Carrier Transport; Charge Separations; Conduction Band Edge; Conversion Efficiency; Electrodes; Hybrid Solar Cells; Hysteresis; J-V Hysteresis; Li-Treatment; Lithium; Methylammoniumleadtriiodide; Perovskite; Power Conversion Efficiencies; Scan Direction; Scanning; Solar Cells; Superconducting Materials; Trap Density
- 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 CH3NH3PbI3 (MAPbI3) 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 MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2. © 2015.
- Elsevier B.V.
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- Convergence Research Center for Solar Energy1. Journal Articles
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