daohang fenxiangbox searchbox qikanlogonew daohangnew searchboxnew navrightzone footerzone paper
中
Home > Journals > ACS Energy Letters
‹ Previous Article Next Article ›

Passivation of Grain Boundaries by Phenethylammonium in Formamidinium-Methylammonium Lead Halide Perovskite Solar Cells AITranslate

Da Seul Lee; Jae Sung Yun; Jincheol Kim; Arman Mahboubi Soufiani; Sheng Chen; Yongyoon Cho; Xiaofan Deng; Jan Seidel; Sean Lim; Shujuan Huang; Anita W. Y. HoBaillie;
University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales; University of New South Wales
AITranslate
Publisher: ACS
Share Citation Information Add to Favorites

    Scan to share on WeChat or Moments

Use WeChat scan.
Share with WeChat friends or Moments

Abstract AITranslate

In this work, we report the benefits of incorporating phenethylammonium cation (PEA+) into (HC(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite for the first time. After adding small amounts of PEA cation (<10%), the perovskite film morphology is changed but, most importantly, grain boundaries are passivated. This is supported by Kelvin Probe Force Microscopy (KPFM). The passivation results in the increase in photoluminescence intensity and carrier lifetimes of test structures and open-circuit voltages (VOC) of the devices as long as the addition of PEA+ is ≤4.5%. The presence of higher-band-gap quasi-2D PEA incorporated perovskite is responsible for the grain boundary passivation, and the quasi-2D perovskites are also found to be concentrated near the TiO2 layer, revealed by PL spectroscopy. Results of moisture exposure tests show that PEA+ incorporation is effective in slowing down the degradation of unencapsulated devices compared to the control devices without PEA+. These findings provide insights into the operation of perovskite solar cells when large cations are incorporated.

KeyWords AITranslate

No data

Basic Information:

DOI：https://doi.org/10.1021/acsenergylett.8b00121

Chinese Library Classification Number:

Citation Information:

In this work, we report the benefits of incorporating phenethylammonium cation (PEA+) into (HC(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite for the first time. After adding small amounts of PEA cation (<10%), the perovskite film morphology is changed but, most importantly, grain boundaries are passivated. This is supported by Kelvin Probe Force Microscopy (KPFM). The passivation results in the increase in photoluminescence intensity and carrier lifetimes of test structures and open-circuit voltages (VOC) of the devices as long as the addition of PEA+ is ≤4.5%. The presence of higher-band-gap quasi-2D PEA incorporated perovskite is responsible for the grain boundary passivation, and the quasi-2D perovskites are also found to be concentrated near the TiO2 layer, revealed by PL spectroscopy. Results of moisture exposure tests show that PEA+ incorporation is effective in slowing down the degradation of unencapsulated devices compared to the control devices without PEA+. These findings provide insights into the operation of perovskite solar cells when large cations are incorporated.

quote

GB/T 7714-2015 [1] Da Seul Lee, Jae Sung Yun, Jincheol Kim, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b00121.
MLA [1] Da Seul Lee, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b00121.
APA [1] Da Seul Lee, Jae Sung Yun, Jincheol Kim, Arman Mahboubi Soufiani, Sheng Chen, Yongyoon Cho, Xiaofan Deng, Jan Seidel, Sean Lim, Shujuan Huang, & Anita W. Y. HoBaillie. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b00121
IEEE [1] Da Seul Lee, Jae Sung Yun, Jincheol Kim, Arman Mahboubi Soufiani, Sheng Chen, Yongyoon Cho, Xiaofan Deng, Jan Seidel, Sean Lim, Shujuan Huang, and Anita W. Y. HoBaillie, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b00121.