Oh, Lee Seul Kim, Dong Hoe Lee, Jin Ah Shin, Seong Sik Lee, Jin-Wook Park, Ik Jae Ko, Min Jae Park, Nam-Gyu Pyo, Sung Gyu Hong, Kug Sun Kim, Jin Young 2024-01-20T08:34:02Z 2024-01-20T08:34:02Z 2021-09-02 2014-10-09 1932-7447 https://pubs.kist.re.kr/handle/201004/126243 We report a new ternary Zn2SnO4 (ZSO) electron-transporting electrode of a CH3NH3PbI3 perovskite solar cell as an alternative to the conventional TiO2 electrode. The ZSO-based perovskite solar cells have been prepared following a conventional procedure known as a sequential (or two-step) process with ZSO compact/mesoscopic layers instead of the conventional TiO2 counterparts, and their solar cell properties have been investigated as a function of the thickness of either the ZSO compact layer or the ZSO mesoscopic layer. The presence of the ZSO compact layer has a negligible influence on the transmittance of the incident light regardless of its thickness, whereas the thickest compact layer blocks the back electron transfer most efficiently. The open-circuit voltage and fill facor increase with the increasing thickness of the mesoscopic ZSO layer, whereas the short circuit current density decreases with the increasing thickness except for the thinnest one (similar to 100 nm). As a result, the device with a 300 nm-thick mesoscopic ZSO layer shows the highest conversion efficiency of 7%. In addition, time-resolved and frequency-resolved measurements reveal that the ZSO-based perovskite solar cell exhibits faster electron transport (similar to 10 times) and superior charge-collection capability compared to the TiO2-based counterpart with similar thickness and conversion efficiency. English American Chemical Society CHARGE-TRANSPORT HIGH-EFFICIENCY ELECTRON RECOMBINATION LENGTHS Zn2SnO4-Based Photoelectrodes for Organolead Halide Perovskite Solar Cells Article 10.1021/jp509183k 1 The Journal of Physical Chemistry C, v.118, no.40, pp.22991 - 22994 The Journal of Physical Chemistry C 118 40 22991 22994 scie scopus 000343016800020 2-s2.0-84908007527 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article CHARGE-TRANSPORT HIGH-EFFICIENCY ELECTRON RECOMBINATION LENGTHS perovskite Zn2SnO4 solar cell