Passiviation of L-3-(4-Pyridyl)-alanine on Interfacial Defects of Perovskite Solar Cell

Wenwen LIU; Zhilei HU; Li WANG; Mengsha CAO; Jing ZHANG; Jing ZHANG; Shuai ZHANG; Ningyi YUAN; Jianning DING

doi:10.15541/jim20200495

Journals >Journal of Inorganic Materials >Volume 36 >Issue 6 >Page 629 > Article

Journal of Inorganic Materials
Vol. 36, Issue 6, 629 (2021)

Passiviation of L-3-(4-Pyridyl)-alanine on Interfacial Defects of Perovskite Solar Cell

Wenwen LIU¹, Zhilei HU¹, Li WANG¹, Mengsha CAO¹, Jing ZHANG¹, Jing ZHANG¹, Shuai ZHANG^1、*, Ningyi YUAN¹, and Jianning DING^2、*

Author Affiliations

¹1. School of Materials Science and Engineering, Jiangsu Photovoltaic Science and Engineering Collaborative Innovation Center, Changzhou university, Changzhou 213164, China

²2. Micro Center for Science and Technology, Jiangsu University, Zhenjiang 212013, China

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DOI: 10.15541/jim20200495 Cite this Article

Wenwen LIU, Zhilei HU, Li WANG, Mengsha CAO, Jing ZHANG, Jing ZHANG, Shuai ZHANG, Ningyi YUAN, Jianning DING. Passiviation of L-3-(4-Pyridyl)-alanine on Interfacial Defects of Perovskite Solar Cell[J]. Journal of Inorganic Materials, 2021, 36(6): 629 Copy Citation Text

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1. (a) Molecular structure of PLA and (b) schematic diagram of PSC device with PLA

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(a,b) Surface and (c,d) cross sectional SEM images, (e,f) grain size distributions of FTO/TiO2/perovskite films (a, c, e) without and (b, d, f) with PLA

2. (a,b) Surface and (c,d) cross sectional SEM images, (e,f) grain size distributions of FTO/TiO₂/perovskite films (a, c, e) without and (b, d, f) with PLA

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3. (a) ATR-FT-IR spectra, ((b) magnified ATR-FT-LR spectra of rectangular area in (a)), (c) UV-Vis absorption spectra and (d) XRD patterns of FTO/TiO₂/perovskite films with and without PLA

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4. Statistical deviations of (a)J_SC, (b)V_OC, (c) FF, and (d) PCE for PSC devices without and with PLA

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5. Forward and reverse scan J-V curves of the optimal PSC devices (a) without and (b) with PLA, (c) comparison of the reverse J-V curves, and (d) external quantum efficiency spectra and integrated J_SC curves for the optimal PSC devices without and with PLA

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6. (a) PL spectra, (b) TRPL spectra (λ_excitation=510 nm) and TRPL fitting results of glass/perovskite films with and without PLA

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7. (a) Schematic diagram of electron-only perovskite film device with PLA, and (b) SCLC measurements of electron-only perovskite film devices with and without PLA

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S1. (a,b) Surface and (c,d) cross sectional SEM images of FTO/TiO₂/PbI₂ film without PLA (a, c) and with PLA (b, d)

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S2. EIS plots of PSC without and with PLA (a) under illumination and (b) in dark

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Device	R_S/ (Ω·cm^-2)	R₁/ (Ω·cm^-2)	R₂/ (Ω·cm^-2)
Without PLA (Illumination)	1.80	58.70	7.90
With PLA (Illumination)	1.43	15.74	40.49
Without PLA (Dark)	0.78	3.46×10⁵	2.27×10⁴
With PLA (Dark)	1.21	2.15×10⁴	4.50×10⁵

Table 1. EIS fitting parameters of PSC without and with PLA under illumination and in dark

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Device	J_SC(SD)/(mA·cm^-2)	V_OC(SD)/V	FF(SD)/%	PCE(SD)/%
Without PLA	23.84(0.74)	1.07(0.02)	76.80(1.15)	19.49(0.48)
With PLA	24.37(0.50)	1.07(0.02)	78.74(1.43)	20.55(0.39)

Table 1. Mean values and standard deviation (SD) of photovoltaic parameters for PSC devices without and with PLA

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