Amidino-based Dion-Jacobson 2D perovskite for efficient and stable 2D/3D heterostructure perovskite solar cells

Yang, Tinghuan; Ma, Chuang; Cai, Weilun; Wang, Shiqiang; Wu, Yin; Feng, Jiangshan; Wu, Nan; Li, Haojin; Huang, Wenliang; Ding, Zicheng; Gao, Lili; Liu, Shengzhong; Zhao, Kui

doi:10.1016/j.joule.2023.02.003

Cited by 86 publications

(68 citation statements)

References 50 publications

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“…Figure f presents the energy level distribution of the functional layers in the PSCs. The optimized gradient distribution of the functional layers is observed to be more compatible, which is conducive to the transportation and extraction of carriers, thereby enhancing the photovoltaic performance of the device …”

Section: Resultsmentioning

confidence: 99%

“…The decrease in binding energy observed can be ascribed to the coordination of the lone electron pair of the N atom on the C�N group in the TFMBI molecule with the undercoordinated Pb 2+ ion vacancies, resulting in their passivation. 21,24 Notably, the analysis of the pristine sample showed two minor peaks at binding energies of 141.6 and 136.7 eV, which are indicative of the presence of metallic lead (Pb 0 ). 25 These small peaks are due to undercoordinated Pb 2+ ions coexisting within the perovskite lattice.…”

Section: Resultsmentioning

confidence: 99%

“…The optimized gradient distribution of the functional layers is observed to be more compatible, which is conducive to the transportation and extraction of carriers, thereby enhancing the photovoltaic performance of the device. 24 Electrochemical characterization is used to analyze the properties of PSCs. Figure 5a depicts the Mott−Schottky curve analysis performed on the built-in potential (V bi ) of PSCs.…”

Section: Resultsmentioning

confidence: 99%

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Synergistic Effect of 2-(Trifluoromethyl) Benzimidazole on the Stability and Performance of Perovskite Solar Cells

Lin,

Wu,

Tian

et al. 2023

ACS Appl. Mater. Interfaces

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The quality of the perovskite active layer directly impacts the photovoltaic performance of perovskite solar cells (PSCs). Unfortunately, perovskite films produced through solution methods often have a significant number of defects on their surface, which lead to a substantial degradation in the performance of devices. For this reason, a multifunctional additive 2-(trifluoromethyl) benzimidazole (TFMBI) is introduced into perovskite films. Based on the Lewis acid/base coordination principle, the TFMBI double site cooperatively passivates surface defects, inhibiting carrier non-radiative recombination. Simultaneously, the hydrophobic solid group (−CF 3 ) of TFMBI covers the surface, establishing a moisture-oxygen barrier and improving the environmental stability of the devices. In consequence, the power conversion efficiency (PCE) of TFMBI-modified PSCs reached 23.16%, significantly higher than the pristine one with a PCE of 20.62%. Additionally, the unencapsulated target device retained 90.32% of its initial PCE even after being reserved in the air with a relative humidity of 20−30% for 60 days.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synergistic Effect of 2-(Trifluoromethyl) Benzimidazole on the Stability and Performance of Perovskite Solar Cells

Lin,

Wu,

Tian

et al. 2023

ACS Appl. Mater. Interfaces

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“…Inspiringly, mixed-dimensional 2D/3D HP films thus have been expected to combine the superior solar conversion of 3D HPs and the favorable stability of 2D HPs . The icing on the cake is that the 2D HP component also serves as a growth template or an efficient passivator for the 3D HP component. , However, the de facto PCE of mixed-dimensional 2D/3D HP solar cells has been unsatisfactory. For the most investigated ones with a nominal n value (termed as [ n ] hereafter) of 3–5, the PCE rarely exceeds 19%.…”

Section: Introductionmentioning

confidence: 99%

“…13 The icing on the cake is that the 2D HP component also serves as a growth template or an efficient passivator for the 3D HP component. 14,15 However, the de facto PCE of mixeddimensional 2D/3D HP solar cells has been unsatisfactory. For the most investigated ones with a nominal n value (termed as [n] hereafter) of 3−5, the PCE rarely exceeds 19%.…”

Section: Introductionmentioning

confidence: 99%

Exploring, Identifying, and Removing the Efficiency-Limiting Factor of Mixed-Dimensional 2D/3D Perovskite Solar Cells

Cao

et al. 2023

Acc. Chem. Res.

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Conspectus Three-dimensional (3D) halide perovskite (HP) solar cells have been thriving as promising postsilicon photovoltaic systems. However, despite the decency of efficiency, they suffer from poor stability. Partial dimensionality reduction from 3D to 2D was found to significantly meliorate the instability, thus mixed-dimensional 2D/3D HP solar cells have been expected to combine favorable durability and high efficiency. Nevertheless, their power conversion efficiency (PCE) does not live up to the expectation, hardly exceeding 19%, in sharp contrast with the ∼26% benchmark for pure 3D HP solar cells. The low PCE primarily arises from the restricted charge transport of the mixed-phasic 2D/3D HP layer. Understanding its photophysical dynamics, including its nanoscopic phase distribution and interphase carrier transfer kinetics, is essential for fathoming the underlying restriction mechanism. This Account outlines the three historical photophysical models of the mixed-phasic 2D/3D HP layer (denoted as models I, II, and III hereafter). Model I opines (i) a gradual dimensionality transition in the axial direction and (ii) a type II band alignment between 2D and 3D HP phases, hence favorably driving global carrier separation. Model II takes the view that (i) 2D HP fragments are interspersed in the 3D HP matrix with a macroscopic concentration variation in the axial direction and (ii) 2D and 3D HP phases instead form a type I band alignment. Photoexcitations would rapidly transfer from wide-band-gap 2D HPs to narrow-band-gap 3D HPs, which then serve as the charge transport network. Model II is currently the most widely accepted. We are one of the earliest groups to unveil the ultrafast interphase energy-transfer process. Recently, we further amended the photophysical model to consider also (i) an interspersing pattern of phase distribution but (ii) the 2D/3D HP heterojunction to be a p–n heterojunction with built-in potential. Anomalously, the built-in potential of the 2D/3D HP heterojunction increases upon photoexcitation. Therefore, local 3D/2D/3D misalignments would severely impede charge transport due to carrier blocking or trapping. Contrary to models I and II which hold 2D HP fragments as the culprit, model III rather suspects the 2D/3D HP interface for blunting the charge transport. This insight also rationalizes the distinct photovoltaic performances of the mixed-dimensional 2D/3D configuration and the 2D-on-3D bilayer configuration. To extinguish the detrimental 2D/3D HP interface, our group also developed an approach to alloy the multiphasic 2D/3D HP assembly into phase-pure intermediates. The accompanying challenges that are coming are also discussed.

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Functional 2D Phases in Mixed Dimensional Perovskite Photovoltaics

Lou

Wang

2023

Adv Funct Materials

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Organic‐inorganic hybrid perovskite solar cells (PSCs) with unique properties exhibit their powerful competitiveness in the photovoltaic field over the past few years. However, the challenges of stability for perovskite devices limit the commercialization and further development. The 2D/3D hybrid structures combine the superior efficiency of bulk perovskites and the superior stability of layered perovskites and gradually get hotspots of the photovoltaic field. In addition, there remains a lack of comprehensive understanding and systematic summary of the function of 2D perovskite attributed to the complex nature of 2D/3D structures. Here, the latest progress of 2D/3D hybrid structures and focus on the functionality of 2D phases in mixed structures and the underlying mechanism from the perspective of their different distributions in the perovskite layer is summarized. Then, the insight and vital factors for overall improvements in the stability of 2D/3D structures are thoroughly discussed. Finally, it is expected that this review will contribute to the present challenges and future research prospects in the photovoltaic industry.

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Amidino-based Dion-Jacobson 2D perovskite for efficient and stable 2D/3D heterostructure perovskite solar cells

Cited by 86 publications

References 50 publications

Synergistic Effect of 2-(Trifluoromethyl) Benzimidazole on the Stability and Performance of Perovskite Solar Cells

Synergistic Effect of 2-(Trifluoromethyl) Benzimidazole on the Stability and Performance of Perovskite Solar Cells

Exploring, Identifying, and Removing the Efficiency-Limiting Factor of Mixed-Dimensional 2D/3D Perovskite Solar Cells

Functional 2D Phases in Mixed Dimensional Perovskite Photovoltaics

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