Qin Jianqiang, Zhang Zhenlong, Shi Wenjia, Liu Yuefeng, Gao Huiping, Mao Yanli
School of Physics and Electronics, Henan University, Kaifeng, 475004, China.
Institute of Micro/Nano Photonic Materials and Applications, Henan University, Kaifeng, 475004, China.
Nanoscale Res Lett. 2017 Dec 29;12(1):640. doi: 10.1186/s11671-017-2418-9.
Perovskite solar cells (PSCs) have attracted tremendous attentions due to its high performance and rapid efficiency promotion. Compact layer plays a crucial role in transferring electrons and blocking charge recombination between the perovskite layer and fluorine-doped tin oxide (FTO) in PSCs. In this study, compact TiO layers were synthesized by spin-coating method with three different titanium precursors, titanium diisopropoxide bis (acetylacetonate) (c-TTDB), titanium isopropoxide (c-TTIP), and tetrabutyl titanate (c-TBOT), respectively. Compared with the PSCs based on the widely used c-TTDB and c-TTIP, the device based on c-TBOT has significantly enhanced performance, including open-circuit voltage, short-circuit current density, fill factor, and hysteresis. The significant enhancement is ascribed to its excellent morphology, high conductivity and optical properties, fast charge transfer, and large recombination resistance. Thus, a power conversion efficiency (PCE) of 17.03% has been achieved for the solar cells based on c-TBOT.
钙钛矿太阳能电池（PSCs）因其高性能和快速的效率提升而备受关注。致密层在PSCs中电子传输以及阻止钙钛矿层与氟掺杂氧化锡（FTO）之间的电荷复合方面起着关键作用。在本研究中，分别采用旋涂法，用三种不同的钛前驱体，即二异丙醇钛双（乙酰丙酮）（c-TTDB）、异丙醇钛（c-TTIP）和钛酸四丁酯（c-TBOT）合成了致密TiO层。与基于广泛使用的c-TTDB和c-TTIP的PSCs相比，基于c-TBOT的器件性能显著增强，包括开路电压、短路电流密度、填充因子和滞后现象。这种显著增强归因于其优异的形貌、高导电性和光学性能、快速的电荷转移以及大的复合电阻。因此，基于c-TBOT的太阳能电池实现了17.03%的功率转换效率（PCE）。
