کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471954 | 1424126 | 2017 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low-temperature processed ultrathin TiO2 for efficient planar heterojunction perovskite solar cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Low-temperature processed ultrathin TiO2 for efficient planar heterojunction perovskite solar cells Low-temperature processed ultrathin TiO2 for efficient planar heterojunction perovskite solar cells](/preview/png/6471954.png)
چکیده انگلیسی
A compact TiO2 (c-TiO2) layer fabricated by spin coating or spray pyrolysis following a high-temperature sintering is a routine in high-performance planar heterojunction perovskite solar cells. Here, we demonstrate an effective low-temperature approach to fabricate an ultrathin and discrete TiO2 (u-TiO2) for enhancing photovoltaic performance of perovskite solar cells. Via hydrolysis of low-concentration TiCl4 solution at 70 °C, u-TiO2 was grown on a fluorine doped tin oxide (FTO) substrate, forming the electron selective contact with the photoactive CH3NH3PbI3 film. The perovskite solar cell using u-TiO2 achieves an efficiency of 13.42%, which is compared to 13.56% of the device using c-TiO2 prepared by high-temperature sintering. Cyclic voltammetry, steady-state photoluminescence spectroscopy and electrical impedance spectroscopy were conducted to study interface engineering and charge carrier dynamics. Our results suggest that u-TiO2 functions as a bridge for electron transport between perovskite and FTO, which accelerates electron transfer and alleviates charge recombination.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 231, 20 March 2017, Pages 77-84
Journal: Electrochimica Acta - Volume 231, 20 March 2017, Pages 77-84
نویسندگان
Xiaokun Huang, Ziyang Hu, Jie Xu, Peng Wang, Jing Zhang, Yuejin Zhu,