Gadolinium-doped SnO2 electron transfer layer for highly efficient planar perovskite solar cells

Wang, Renjie; Wu, Jionghua; Wei, Shuping; Zhu, Jingwei; Guo, Minghuang; Qiao, Zheng; Mao, Wei; Cheng, Shuying

doi:10.1016/j.jpowsour.2022.231870

Cited by 31 publications

(21 citation statements)

References 50 publications

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“…The O-H stretching vibration at 3300 cm −1 for SnO 2 -CuCl 2 is much lower than that of pristine SnO 2 [24]. The reduced surface defect states would suppress the non-radiative recombination at the interface between PVSK and ETL in PSCs based on SnO 2 -CuCl 2 ETLs [24,25]. Figure 1(d) shows the XPS spectra of Cu 2p.…”

Section: Resultsmentioning

confidence: 99%

CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

Liu

Yuan

et al. 2023

Nanotechnology

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SnO2 film is one of the most widely used electron transport layers (ETL) in perovskite solar cells (PSCs). However, the inherent surface defect states in SnO2 film and mismatch of the energy level alignment with perovskite limit the photovoltaic performance of PSCs. It is of great interesting to modify SnO2 ETL with additive, aiming to decrease the surface defect states and obtain well aligned energy level with perovskite. In this paper, anhydrous copper chloride (CuCl2) was employed to modify the SnO2 ETL. It is found that the adding of a small amount of CuCl2 into the SnO2 ETL can improve the proportion of Sn4+ in SnO2, passivate oxygen vacancies at the surface of SnO2 nanocrystals, improve the hydrophobicity and conductivity of ETL, and obtain a good energy level alignment with perovskite. As a result, both the photoelectric conversion efficiency (PCE) and stability of the PSCs based on SnO2 ETLs modified with CuCl2 (SnO2-CuCl2) is improved in comparison with that of the PSCs on pristine SnO2 ETLs. The optimal PSC based on SnO2-CuCl2 ETL exhibits a much higher PCE of 20.31% as compared to the control device (18.15%). The unencapsulated PSCs with CuCl2 modification maintain 89.3% of their initial PCE after exposing for 16 days under ambient conditions with a relative humidity of 35%. Cu(NO3)2 was also employed to modify the SnO2 ETL and achieved a similar effect as that of CuCl2, indicating that the cation Cu2+ plays the main role in SnO2 ETL modification.

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Section: Resultsmentioning

confidence: 99%

CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

Liu

Yuan

et al. 2023

Nanotechnology

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“…3e exhibit the perovskite film fabricated on SnO 2 and SnO 2 –BCA fitted by a double exponential model:where A 1 and A 2 are relative amplitudes, and τ 1 and τ 2 are the carrier lifetimes of fast decay and slow decay, respectively. 38–40 The final fitting parameters are listed in Table S3 †. The fast decay lifetime τ 1 decreased from 10.89 to 5.58 ns, indicating that the interfacial non-radiative recombination was inhibited.…”

Section: Resultsmentioning

confidence: 99%

Synchronous amelioration of SnO₂surface aggregation and buried layer defects by sodium salts for high-efficiency and stable perovskite solar cells

zha

Lei

Zhang

et al. 2023

Sustainable Energy Fuels

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“…This suggested that there was stronger charge transport at the ETL/PVK interface and better quality of the CsPbBr3 films after SCN doping. High-quality CsPbBr3 films are associated with low defects in the electron transport layer since a low defect density in the transport layer provides a large contact area for the growth of CsPbBr3 crystals [15] . The current density and voltage characteristic curves of the devices based on SnO2 ETL with different SCN-doped ratios are shown in Figure 4a.…”

Section: Sn − Oh + Nh → Sn + Nh + H Omentioning

confidence: 99%

SCN-doped SnO2 electron transport layer enhanced photoelectric performance of all-inorganic CsPbBr3 perovskite solar cells

Yuan,

Peng,

Yang

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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With remarkable improvement in power conversion efficiency (PCE), perovskite solar cells (PSCs) have garnered a lot of interest in the photovoltaic industry. Among them, the all-inorganic CsPbBr3 perovskite has been widely used in solar cells because of its exceptional stability and potential commercial applications. In addition, the advantages of low-temperature preparation that minimizes energy loss and favorable energy level arrangement with a wide band gap have made SnO2 potentially displace TiO2 as the most common electron transport layer (ETL) material. However, the performance of SnO2based PSCs was restricted by the defects and under-coordinated tin ions in SnO2 films. In this study, we prepared a highquality SCN-doped tin oxide (SnO2) electron transport layer, obtaining ITO/SCN-SnO2/CsPbBr3/Carbon structural solar cell. The open circuit voltage, fill factor, short circuit current density, and PCE of the best device was 1.37 V, 68.68%, 7.02 mA/cm2, and 6.61%, respectively, higher than the pristine devices. The results indicated that SCN doping could achieve higher-quality SnO2 electron transport layers, thereby improving the performance of inorganic CsPbBr3 perovskite solar cells.

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Gadolinium-doped SnO2 electron transfer layer for highly efficient planar perovskite solar cells

Cited by 31 publications

References 50 publications

CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

Synchronous amelioration of SnO₂surface aggregation and buried layer defects by sodium salts for high-efficiency and stable perovskite solar cells

SCN-doped SnO2 electron transport layer enhanced photoelectric performance of all-inorganic CsPbBr3 perovskite solar cells

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Gadolinium-doped SnO2 electron transfer layer for highly efficient planar perovskite solar cells

Cited by 31 publications

References 50 publications

CuCl2-modified SnO2 electron transport layer for high efficiency perovskite solar cells

CuCl2-modified SnO2 electron transport layer for high efficiency perovskite solar cells

Synchronous amelioration of SnO2surface aggregation and buried layer defects by sodium salts for high-efficiency and stable perovskite solar cells

SCN-doped SnO2 electron transport layer enhanced photoelectric performance of all-inorganic CsPbBr3 perovskite solar cells

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CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

CuCl₂-modified SnO₂ electron transport layer for high efficiency perovskite solar cells

Synchronous amelioration of SnO₂surface aggregation and buried layer defects by sodium salts for high-efficiency and stable perovskite solar cells