Defect passivation with potassium trifluoroborate for efficient spray-coated perovskite solar cells in air

Chen Gao; Hui Wang; Pang Wang; Jinlong Cai; Yuandong Sun; Cong Yu; Teng Li; Xiaoshuai Zhang; Dan Liu; Tao Wang

doi:10.1088/1674-4926/43/9/092201

Journal of Semiconductors, Volume. 43, Issue 9, 092201(2022)

Defect passivation with potassium trifluoroborate for efficient spray-coated perovskite solar cells in air

Chen Gao^*, Hui Wang^*, Pang Wang^*, Jinlong Cai^*, Yuandong Sun^*, Cong Yu^*, Teng Li^*, Xiaoshuai Zhang^*, Dan Liu^*, and Tao Wang^aff*

Author Affiliations

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

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Figures & Tables(7)

Fig. 1. (Color online) (a) Schematic diagram of one-step spray-coating perovskite films. (b) Structure of the spray-coated devices. (c) Schematic diagram of the action of C₇H₇BF₃KO.

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Fig. 2. (Color online) The optical images of (a) reference and (e) C₇H₇BF₃KO based spray-coated perovskite films. The AFM images of (b–d) reference and (f–h) C₇H₇BF₃KO based spray-coated perovskite films at different magnifications.

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Fig. 3. (Color online) (a) XRD patterns, (b) UV–vis absorption spectra, (c) steady-state PL spectra and (d) TRPL decay curves of reference and C₇H₇BF₃KO based spray-coated perovskite films.¹H NMR spectra of (e) FAI, C₇H₇BF₃KO and FAI-C₇H₇BF₃KO mixture and (f) MABr, C₇H₇BF₃KO and MABr-C₇H₇BF₃KO mixture in DMSO-d6 solution.

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Fig. 4. (Color online) (a)J–V curves of the reference and C₇H₇BF₃KO based spray-coated PSCs. (b) EQE spectra and corresponding integratedJ_SC. (c) Mott–Schottky plots and (d) darkJ–V curves of PSCs. (e) The SCLC curves of electron-only devices. (f) Nyquist plots of PSCs.

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Table 0. Summary of photovoltaic performance parameters of the reference and C₇H₇BF₃KO based spray-coated PSCs.

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Table 0. Summary of photovoltaic performance parameters of the reference and C₇H₇BF₃KO based spray-coated PSCs.

Additive	Scan direction	PCE_max (PCE_ave) (%)	FF (FF_ave) (%)	J_SC (J_SCave) (mA/cm² )	V_OC (V_OCave) (V)
w/o	reverse	16.3 (14.7 ± 1.1)	67.1 (62.0 ± 3.9)	21.9 (21.6 ± 0.5)	1.11 (1.09 ± 0.02)
w/o	forward	14.9 (12.6 ± 1.2)	61.6 (53.8 ± 4.5)	21.9 (21.8 ± 0.5)	1.11 (1.07 ± 0.02)
C₇H₇BF₃KO	reverse	19.4 (17.6 ± 0.8)	77.4 (72.4 ± 2.5)	22.0 (21.8 ± 0.3)	1.14 (1.11 ± 0.01)
C₇H₇BF₃KO	forward	19.5 (17.6 ± 0.9)	77.8 (72.6 ± 3.1)	22.0 (21.9 ± 0.3)	1.14 (1.11 ± 0.01)

Table 0. The fitting parameters of EIS for reference and C₇H₇BF₃KO-based spray-coated perovskite devices.
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Table 0. The fitting parameters of EIS for reference and C₇H₇BF₃KO-based spray-coated perovskite devices.
Additive R_s (Ω·cm²) R_rec (Ω·cm²) CPE-T (F/cm²) CPE-P
w/o 156 15 886 9.80 × 10⁻⁹ 0.93
C₇H₇BF₃KO 136 18 972 7.62 × 10⁻⁹ 0.93

Table 0. The fitting parameters of TRPL for reference and C₇H₇BF₃KO based spray-coated perovskite films.
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Table 0. The fitting parameters of TRPL for reference and C₇H₇BF₃KO based spray-coated perovskite films.
Additive τ₁ (ns) A₁ (%) τ₂ (ns) A₂ (%) τ_ave (ns)
w/o 100 39 266 61 201
C₇H₇BF₃KO 140 33 370 67 294

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Chen Gao, Hui Wang, Pang Wang, Jinlong Cai, Yuandong Sun, Cong Yu, Teng Li, Xiaoshuai Zhang, Dan Liu, Tao Wang. Defect passivation with potassium trifluoroborate for efficient spray-coated perovskite solar cells in air[J]. Journal of Semiconductors, 2022, 43(9): 092201

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Paper Information

Category: Articles

Received: Apr. 19, 2022

Accepted: --

Published Online: Nov. 17, 2022

The Author Email: Chen Gao (twang@whut.edu.cn), Hui Wang (twang@whut.edu.cn), Pang Wang (twang@whut.edu.cn), Jinlong Cai (twang@whut.edu.cn), Yuandong Sun (twang@whut.edu.cn), Cong Yu (twang@whut.edu.cn), Teng Li (twang@whut.edu.cn), Xiaoshuai Zhang (twang@whut.edu.cn), Dan Liu (twang@whut.edu.cn), Tao Wang (twang@whut.edu.cn)

DOI:10.1088/1674-4926/43/9/092201

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 0. Summary of photovoltaic performance parameters of the reference and C7H7BF3KO based spray-coated PSCs.

Table 0. Summary of photovoltaic performance parameters of the reference and C7H7BF3KO based spray-coated PSCs.

Table 0. The fitting parameters of EIS for reference and C7H7BF3KO-based spray-coated perovskite devices.

Table 0. The fitting parameters of EIS for reference and C7H7BF3KO-based spray-coated perovskite devices.

Table 0. The fitting parameters of TRPL for reference and C7H7BF3KO based spray-coated perovskite films.

Table 0. The fitting parameters of TRPL for reference and C7H7BF3KO based spray-coated perovskite films.

Table 0. Summary of photovoltaic performance parameters of the reference and C₇H₇BF₃KO based spray-coated PSCs.

Table 0. Summary of photovoltaic performance parameters of the reference and C₇H₇BF₃KO based spray-coated PSCs.

Table 0. The fitting parameters of EIS for reference and C₇H₇BF₃KO-based spray-coated perovskite devices.

Table 0. The fitting parameters of EIS for reference and C₇H₇BF₃KO-based spray-coated perovskite devices.

Table 0. The fitting parameters of TRPL for reference and C₇H₇BF₃KO based spray-coated perovskite films.

Table 0. The fitting parameters of TRPL for reference and C₇H₇BF₃KO based spray-coated perovskite films.