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Liu Z, Hu J, Jiao H, et al. Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells. Adv Mater. 2017;29(23)doi: 10.1002/adma.201606774.
Liu, Z., Hu, J., Jiao, H., Li, L., Zheng, G., Chen, Y., Huang, Y., Zhang, Q., Shen, C., Chen, Q., & Zhou, H. (2017). Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells. Advanced materials (Deerfield Beach, Fla.), 29(23), . https://doi.org/10.1002/adma.201606774
Liu, Zonghao, et al. "Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells." Advanced materials (Deerfield Beach, Fla.) vol. 29,23 (2017). doi: https://doi.org/10.1002/adma.201606774
Liu Z, Hu J, Jiao H, Li L, Zheng G, Chen Y, Huang Y, Zhang Q, Shen C, Chen Q, Zhou H. Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells. Adv Mater. 2017 Jun;29(23). doi: 10.1002/adma.201606774. Epub 2017 Apr 18. PMID: 28417481.
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Adv Mater. 2017 Jun;29(23). doi: 10.1002/adma.201606774. Epub 2017 Apr 18.

Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells.

Advanced materials (Deerfield Beach, Fla.)

Zonghao Liu, Junnan Hu, Haoyang Jiao, Liang Li, Guanhaojie Zheng, Yihua Chen, Yuan Huang, Qing Zhang, Chao Shen, Qi Chen, Huanping Zhou

Affiliations

  1. Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
  2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
  3. State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China.

PMID: 28417481 DOI: 10.1002/adma.201606774

Abstract

Minimization of defects in absorber materials is essential for hybrid perovskite solar cells, especially when constructing thick polycrystalline layers in a planar configuration. Here, a simple methylamine solution-based additive is reported to improve film quality with nearly an order of magnitude reduction in intrinsic defect concentration. In the resultant film, an increase in carrier lifetime as a result of a decrease in shallow electronic disorder is observed. This superior crystalline film quality is further evidenced via a doubled spin relaxation time as compared with other reports. Bearing sufficient carrier diffusion length, a thick absorber layer (≈650 nm) is implemented in planar devices to achieve a champion power conversion efficiency of 20.02% with a stabilized output efficiency of 19.01% under one sun illumination. This work demonstrates a simple approach to improve hybrid perovskite film quality by substantial reduction of intrinsic defects for wide applications in optoelectronics.

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: additives; defects; high efficiency; perovskites; solar cells

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