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Interlayer Interaction Enhancement in Ruddlesden–Popper Perovskite Solar Cells toward High Efficiency and Phase Stability AITranslate

Mingzhu Long; Tiankai Zhang; Dongcheng Chen; Minchao Qin; Zefeng Chen; Li Gong; Xinhui Lu; Fangyan Xie; Weiguang Xie; Jian Chen; Jianbin Xu;
The Chinese University of Hong Kong; The Chinese University of Hong Kong; South China University of Technology; The Chinese University of Hong Kong; The Chinese University of Hong Kong; Sun Yat-sen University; The Chinese University of Hong Kong; Sun Yat-sen University; Jinan University; Sun Yat-sen University; The Chinese University of Hong Kong
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Publisher: ACS
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Abstract AITranslate

Ruddlesden–Popper perovskites (RPPs) have attracted intense attention owing to their superior stability. However, the interspace and weak interaction between the inorganic layers inhibits direct charge transfer and brings the phase segregation issue under light illumination. Herein, it is presented that after incorporation of a symmetric cation guanidinium (GA+) with three amino groups the crystallinity, photoelectronic properties, and stability can be synchronously ameliorated owning to the enhanced interlayer interaction. The new (BA,GA)2(MA)2Pb3I10 RPP film shows a preferentially vertical orientation and possesses a spatially well-aligned band from the bottom to the top surface, resulting in fast energy transfer. It contributes to a large Voc of 1.25 V with minimized nonradiative loss of 0.14 V and a boosted efficiency of 14.47%. More importantly, the lattice strain in the RPP film can be eliminated due to the medium size of GA+, protecting it from phase segregation even under laser irradiation.

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DOI：https://doi.org/10.1021/acsenergylett.9b00351

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Citation Information:

Ruddlesden–Popper perovskites (RPPs) have attracted intense attention owing to their superior stability. However, the interspace and weak interaction between the inorganic layers inhibits direct charge transfer and brings the phase segregation issue under light illumination. Herein, it is presented that after incorporation of a symmetric cation guanidinium (GA+) with three amino groups the crystallinity, photoelectronic properties, and stability can be synchronously ameliorated owning to the enhanced interlayer interaction. The new (BA,GA)2(MA)2Pb3I10 RPP film shows a preferentially vertical orientation and possesses a spatially well-aligned band from the bottom to the top surface, resulting in fast energy transfer. It contributes to a large Voc of 1.25 V with minimized nonradiative loss of 0.14 V and a boosted efficiency of 14.47%. More importantly, the lattice strain in the RPP film can be eliminated due to the medium size of GA+, protecting it from phase segregation even under laser irradiation.

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GB/T 7714-2015 [1] Mingzhu Long, Tiankai Zhang, Dongcheng Chen, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b00351.
MLA [1] Mingzhu Long, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b00351.
APA [1] Mingzhu Long, Tiankai Zhang, Dongcheng Chen, Minchao Qin, Zefeng Chen, Li Gong, Xinhui Lu, Fangyan Xie, Weiguang Xie, Jian Chen, & Jianbin Xu. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b00351
IEEE [1] Mingzhu Long, Tiankai Zhang, Dongcheng Chen, Minchao Qin, Zefeng Chen, Li Gong, Xinhui Lu, Fangyan Xie, Weiguang Xie, Jian Chen, and Jianbin Xu, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b00351.