中国物理B ›› 2018, Vol. 27 ›› Issue (1): 18810-018810.doi: 10.1088/1674-1056/27/1/018810

所属专题: SPECIAL TOPIC — New generation solar cells

• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇    下一篇

TiO2 composite electron transport layers for planar perovskite solar cells by mixed spray pyrolysis with precursor solution incorporating TiO2 nanoparticles

Jiaqi Tian(田嘉琪), Hongcui Li(李红翠), Haiyue Wang(王海月), Bo Zheng(郑博), Yebin Xue(薛叶斌), Xizhe Liu(刘喜哲)   

  1. Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China
  • 收稿日期:2017-09-29 修回日期:2017-11-16 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Xizhe Liu E-mail:liu_xizhe@jlu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51772125 and 51273079) and the Science Development Program of Jilin Province, China (Grant No. 20150519021JH).

TiO2 composite electron transport layers for planar perovskite solar cells by mixed spray pyrolysis with precursor solution incorporating TiO2 nanoparticles

Jiaqi Tian(田嘉琪), Hongcui Li(李红翠), Haiyue Wang(王海月), Bo Zheng(郑博), Yebin Xue(薛叶斌), Xizhe Liu(刘喜哲)   

  1. Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China
  • Received:2017-09-29 Revised:2017-11-16 Online:2018-01-05 Published:2018-01-05
  • Contact: Xizhe Liu E-mail:liu_xizhe@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51772125 and 51273079) and the Science Development Program of Jilin Province, China (Grant No. 20150519021JH).

摘要: Perovskite solar cells with planar structure are attractive for their simplified device structure and reduced hysteresis effect. Compared to conventional mesoporous devices, TiO2 porous scaffold layers are removed in planar devices. Then, compact TiO2 electron transport layers take the functions of extracting electrons, transporting electrons, and blocking holes. Therefore, the properties of these compact TiO2 layers are important for the performance of solar cells. In this work, we develop a mixed spray pyrolysis method for producing compact TiO2 layers by incorporating TiO2 nanoparticles with different size into the precursor solutions. For the optimized nanoparticle size of 60 nm, a power conversion efficiency of 16.7% is achieved, which is obviously higher than that of devices without incorporated nanoparticles (9.9%). Further investigation reveals that the incorporation of nanoparticles can remarkably improve the charge extraction and recombination processes.

关键词: perovskite solar cell, electron transport layer, charge extraction, recombination

Abstract: Perovskite solar cells with planar structure are attractive for their simplified device structure and reduced hysteresis effect. Compared to conventional mesoporous devices, TiO2 porous scaffold layers are removed in planar devices. Then, compact TiO2 electron transport layers take the functions of extracting electrons, transporting electrons, and blocking holes. Therefore, the properties of these compact TiO2 layers are important for the performance of solar cells. In this work, we develop a mixed spray pyrolysis method for producing compact TiO2 layers by incorporating TiO2 nanoparticles with different size into the precursor solutions. For the optimized nanoparticle size of 60 nm, a power conversion efficiency of 16.7% is achieved, which is obviously higher than that of devices without incorporated nanoparticles (9.9%). Further investigation reveals that the incorporation of nanoparticles can remarkably improve the charge extraction and recombination processes.

Key words: perovskite solar cell, electron transport layer, charge extraction, recombination

中图分类号:  (Solar cells (photovoltaics))

  • 88.40.H-
88.40.hj (Efficiency and performance of solar cells) 73.63.-b (Electronic transport in nanoscale materials and structures)