Zhang Xiao-Chun; Wang Li-Kun; Shang Wen-Li; Wan Zheng-Hui; Yue Xin; Yang Hua-Yi; Li Ting; Wang Hui

doi:10.7498/aps.73.20241238

Abstract

Inverted (p-i-n) perovskite solar cells (PSCs) are receiving increasing attention due to their high conversion efficiency and good stability. The main factor restricting the efficiency improvement of inverted perovskite cells is the interface defect between the perovskite layer and the charge transport layers. Therefore, the dual modification strategy of 1, 3-diaminopropane dihydroiodide (PDADI) passivates the interface defects between perovskite films and charge transport layers, improves the quality of perovskite film formation, suppresses non radiative recombination between perovskite films and charge transport layers as well as improved charge carrier transport, and results in a conversion efficiency of 23.19%. Furthermore, the unencapsulated PSCs with PDADI dual modification also exhibit good storage stability, with efficiency remaining at 96% of initial efficiency after 600 hours of storage at a temperature of 25 ℃ and humidity below 20%. Therefore, PDADI dual modification provides an effective strategy for fabricating high-efficiency and stable inverted perovskite solar cells.

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Authors and contacts

Corresponding author: Li Ting, tingli430@lnnu.edu.cn ; Wang Hui, hwang1606@dicp.ac.cn

Funds: Project supported by the Doctor Foundation of Science and Technology Department of Liaoning Province, China (Grant No. 2021-BS-200).

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DownLoad: Full-Size Img PowerPoint

	T₁/ns	A₁	T₂/ns	A₂	T_average/ns
Control	149.17	23.40	2089.05	1.16	311.27
Single-modification	228.55	14.99	1528.54	0.82	295.77
Dual-modification	183.4	28.71	991.57	1.37	220.21

DownLoad: CSV

		V_oc/V	J_sc/(mA·cm^–2)	Fill factor/%	Efficiency/%
Control	Forward	1.02	25.04	73.02	18.80
Control	Reverse	1.04	25.16	81.19	21.34
Single-modification	Forward	1.05	25.19	77.99	20.81
Single-modification	Reverse	1.06	25.24	82.89	22.27
Dual-modification	Forward	1.09	25.34	82.25	22.55
Dual-modification	Reverse	1.09	25.36	84.15	23.19

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Vol. 73, Issue 24 - 2024-12-20

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