کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7935239 | 1513052 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Diameter engineering on TiO2 nanorod arrays for improved hole-conductor-free perovskite solar cells
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
TiO2 nanorod arrays (NAs) have been successfully applied in mesoporous perovskite solar cells (PSCs) due to the direct electron transfer channels, and previous focus has been mainly on the length of TiO2 NAs to improve the performance. To date, diameter engineering without changing length is still a big challenge, which is another key factor on the performance of TiO2 NAs-based PSCs. Here, the diameter of TiO2 NAs was effectively engineered by annealing temperatures from 100â¯Â°C to 500â¯Â°C to enhance the crystallinity and surface smoothness of TiOx seed-layers, which restrained the transverse direction to decrease the average diameter of TiO2 NAs from 74 to 31â¯nm via the Steric effect. In addition, the smooth TiOx seed-layers improved the vertical orientation of the TiO2 NAs. The TiO2 NAs were further applied as photoanodes in carbon-based PSCs without hole conductor layers. The fine and vertical TiO2 NAs enhance the performance of PSCs, which mainly results from the improved charge transfer and excellent transmission. The carbon-based PSCs with 31â¯nm TiO2 NAs achieved the best performance with power conversion efficiency (PCE) up to 10.15%, which is higher than 7.18% of that based on the common TiO2 nanoparticles. Therefore, our findings suggest that the annealing of seed-layers at different temperatures is a feasible and effective strategy to acquire diameter engineering on TiO2 NAs for high performance PSCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 166, 15 May 2018, Pages 42-49
Journal: Solar Energy - Volume 166, 15 May 2018, Pages 42-49
نویسندگان
Wei Liu, Liang Chu, Ruiyuan Hu, Rui Zhang, Yuhui Ma, Yong Pu, Jian Zhang, Jianping Yang, Xing'ao Li, Wei Huang,