UV light absorbers executing synergistic effects of passivating defects and improving photostability for efficient perovskite photovoltaics

Li, Jiale; Qi, Wenjing; Li, Yameng; Jiao, Sumin; Ling, Hao; Wang, Peng; Zhou, Xin; Sohail, Khumal; Wang, Guangcai; Hou, Guofu; Luo, Jingshan; Zhao, Ying; Ding, Liming; Li, Yuelong; Zhang, Xiaodan

doi:10.1016/j.jechem.2021.09.027

Cited by 22 publications

(25 citation statements)

References 25 publications

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“…The built-in potential in the PSCs was also analyzed using the capacitance–voltage ( C – V ) characteristics measured for the PSCs with the F4-TCNQ-, PMMA- and PMMA:F4-TCNQ-modified PTAA HTLs and the control PSC with a pristine PTAA HTL. Mott–Schottky analysis of the C – V characteristics was carried out using eqn (1): 34 where C is the capacitance, ε is the relative permittivity, ε 0 is the vacuum permittivity, A is the active area of the PSCs, N is the carrier concentration, and V is the applied bias. The built-in potential V bi can be derived from the intercept of the applied bias ( X -axis).…”

Section: Resultsmentioning

confidence: 99%

High efficiency perovskite solar cells with PTAA hole transport layer enabled by PMMA:F4-TCNQ buried interface layer

Hu,

Zhang,

Ren

et al. 2022

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

High efficiency perovskite solar cells with PTAA hole transport layer enabled by PMMA:F4-TCNQ buried interface layer

Hu,

Zhang,

Ren

et al. 2022

J. Mater. Chem. C

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“…The methods to characterize perovskite films and devices are as described in our earlier work, so the characterization methods are detailed in the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

“…Materials. The materials required to fabricate perovskite devices are described in our earlier work, 22 and thus a detailed list is shown in the Supporting Information. In addition, BP6 was purchased without purification from Macklin Inc.…”

Section: Methodsmentioning

confidence: 99%

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2,2′-Dihydroxy-4,4′-dimethoxy-benzophenon as Bifunctional Additives for Passivated Defects and Improved Photostability of Efficient Perovskite Photovoltaics

et al. 2022

ACS Appl. Mater. Interfaces

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Organic–inorganic hybrid perovskite solar cells (PSCs) have developed rapidly in the past decade, but their commercial applications are restricted by further improvement in their photovoltaic performance and stability. Herein, we propose a facile and effective method employing 2,2′-dihydroxy-4,4′-dimethoxy-benzophenon (BP6) as bifunctional additive to construct efficient and photostable PSCs. BP6, as an additive, improves the crystallization quality of perovskite absorbers and further inhibits defect-mediated non-radiative recombination through interaction between the CO group and defects; as a UV absorber, BP6 protects the PSCs from UV degradation by effectively absorbing UV light through molecular tautomerism under continuous strong UV irradiation. Eventually, the champion PSC demonstrates an efficiency of 22.85% with enhanced UV stability after addition of 0.024 wt % BP6. These results reveal that addition of UV absorbers (such as BP6 in this study) is a simple and effective strategy to fabricate efficient and photostable PSCs.

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“…As a widely used UV absorber in the industry, 2-(2-hydroxy-5-methylphenyl)benzotriazole (UVP) was also used as an additive to PbI 2 . [82] The incorporated UVP molecule absorbs UV through the opening and closing of the chelating ring. The comparisons of stability are presented in Table 2.…”

Section: Component Optimization Of Perovskitementioning

confidence: 99%

Ultraviolet Photocatalytic Degradation of Perovskite Solar Cells: Progress, Challenges, and Strategies

Chen

Xie

Gao

2022

Adv Energy and Sustain Res

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Perovskite solar cells (PSCs) have received great attention due to their ever-increasing power conversion efficiency (PCE), low-cost materials, and easy solution preparation. The certified efficiency of PSCs reached 25.5% [1] based on a lab scale, exceeding the performance of copper indium gallium selenide (CIGS) and CdTe thin-film solar cells and approaching the highest reported value of the mainstream silicon solar cell. [2] The highest-efficiency devices generally use the regular n-i-p structure composed of a perovskite absorber between a metal oxide electron transport layer (MOETL) and an organic hole transport layer (HTL). [1,3] Miyasaka et al. first adopted CH 3 NH 3 PbI 3 and CH 3 NH 3 PbBr 3 as light absorbers in liquid electrolyte-based dyesensitized solar cells using a thick TiO 2 layer (%10 μm) as an electron collector. The first PSCs achieved a PCE of 3.8%. [4] After that, tremendous efforts have been made for the PSCs based on TiO 2 . The PSCs included an n-type TiO 2 ETL, a perovskite absorber layer, a p-type 2,2 0 ,7,7 0tetrakis-(N,N-di-4-methoxyphenylamino)-9,9 0 -spirobifluorene (Spiro-OMeTAD) HTL, which has been the most typical and successful structure. Grätzel et al. achieved the first certified efficiency of 14.14% based on the aforementioned n-i-p structure with compact TiO 2 (c-TiO 2 )/mesoporous TiO 2 (m-TiO 2 ). [5] In the following years, the performance of the PSCs based on TiO 2 achieved tremendous progress. To remove the organic material in TiO 2 paste and achieve high-quality m-TiO 2 layer, a hightemperature sintering process (>500 C) was generally needed. [6] To avoid high-temperature processing, low-temperature processed SnO 2 was developed. Tian and co-workers adopted SnO 2 thin films attained by spin coating SnO 2 nanoparticles on indium-doped tin oxide (ITO) followed by low-temperature annealing at 200 C, and a 13% PCE was achieved. [7] Huge progress of SnO 2 -based PSCs was reported by Fang and co-workers. They adopted thermal decomposition of SnCl 2 •2H 2 O precursor at 180 C in ambient air to form SnO 2 film and achieved 17.21% efficiency. [8] Later on, Hagfeldt et al. used low-temperature chemical bath deposition to grow SnO 2 ETL and obtained almost hysteresis-free PCEs of 20.8%. [9] In 2019, the PCE of the planar SnO 2 PSCs reached a certified efficiency of 23.32%, which first surpassed that of m-TiO 2 PSCs. [10] Therefore, SnO 2 has increasingly attracted great attention as an ETL for PSCs, and it is considered as the most promising alternative to TiO 2 . Up to date, all the world records of the certified PCE were achieved based on TiO 2 or SnO 2 n-i-p conventional structures since the PSCs appeared in 2009 (Figure 1). [1,3,5,6,[10][11][12][13][14][15] Recently, a PCE of 25.8% (certified 25.5%) has been achieved based on Cl-bonded SnO 2 . [1] Thus, the important key to achieve state-of-the-art PSCs is the application of TiO 2 or SnO 2 , due to its excellent electrical properties.

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UV light absorbers executing synergistic effects of passivating defects and improving photostability for efficient perovskite photovoltaics

Cited by 22 publications

References 25 publications

High efficiency perovskite solar cells with PTAA hole transport layer enabled by PMMA:F4-TCNQ buried interface layer

High efficiency perovskite solar cells with PTAA hole transport layer enabled by PMMA:F4-TCNQ buried interface layer

2,2′-Dihydroxy-4,4′-dimethoxy-benzophenon as Bifunctional Additives for Passivated Defects and Improved Photostability of Efficient Perovskite Photovoltaics

Ultraviolet Photocatalytic Degradation of Perovskite Solar Cells: Progress, Challenges, and Strategies

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