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Science China Materials

, Volume 62, Issue 2, pp 173–180 | Cite as

Tailoring electrical property of the low-temperature processed SnO2 for high-performance perovskite solar cells

  • Jing Liu (刘京)
  • Nan Li (李楠)
  • Qingshun Dong (董庆顺)
  • Jiangwei Li (李江伟)
  • Chao Qin (秦超)
  • Liduo Wang (王立铎)Email author
Articles
  • 79 Downloads

Abstract

Herein, we for the first time doped Nb5+ into the low-temperature (<100°C) SnO2 sol-gel route to tailor the electrical property of SnO2 layers and the band alignment between SnO2 and the normally used mixed perovskites. The results revealed that proper Nb5+ doping increased the conductivity of the SnO2 electron transport layer (ETL), and the conduction band (CB) level of the SnO2 ETL was shifted down to approach the CB level of perovskites, which facilitated the electron injection from perovskite to SnO2, accelerated the charge transport, and reduced the non-radiative recombination, leading to improved power conversion efficiency from 18.06% to 19.38%. The Nb5+ doping process provided an efficient route for fabricating high-efficiency perovskite solar cells (PSCs) at a temperature lower than 100°C, and promoted the commercialization progress of PSCs.

Keywords

SnO2 niobium doping band alignment perovskite solar cells photo-stability 

调控低温氧化锡电学性质制备高效率钙钛矿太阳能电池

摘要

本文中我们首次在低温(<100°C)SnO2溶胶-凝胶中通过掺杂Nb5+调控SnO2电学性质, 使SnO2与混合离子钙钛矿之间形成更匹配的能级. 掺杂Nb5+后SnO2电子传输层导电率明显提升, 导带位置下移更加接近混合离子钙钛矿导带, 有效促进了电子由SnO2向钙钛矿层的注入, 并加速了电子传输过程, 二者的共同作用使非辐射复合几率降低, 器件效率由18.06%提升至19.38%. Nb5+掺杂SnO2为低温(<100°C)制备高效率钙钛矿太阳能电池提供了有效参考途径, 有望进一步推动钙钛矿太阳能电池的产业化进程.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (51273104 and 91433205).

Supplementary material

40843_2018_9305_MOESM1_ESM.pdf (2.2 mb)
Tailoring Electrical Property of the Low-temperature Processed SnO2 For High-performance Perovskite Solar Cells

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jing Liu (刘京)
    • 1
    • 2
  • Nan Li (李楠)
    • 1
  • Qingshun Dong (董庆顺)
    • 1
  • Jiangwei Li (李江伟)
    • 1
  • Chao Qin (秦超)
    • 2
  • Liduo Wang (王立铎)
    • 1
    Email author
  1. 1.Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of ChemistryTsinghua UniversityBeijingChina
  2. 2.Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of ChemistryNortheast Normal UniversityChangchunChina

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