<i>In situ</i> surface regulation of 3D perovskite using diethylammonium iodide for highly efficient perovskite solar cells

Yue, Xiaopeng; Yang, Yingying; Zhao, Xing; Fan, Bingbing; Yan, Huilin; Qu, Shujie; Zhang, Qiang; Lan, Zhineng; Du, S. X.; Huang, Hao; Yan, Liang; Wang, Xinxin; Cui, Peng; Ma, Junfeng; Li, Meicheng

doi:10.1039/d2cp05535j

Cited by 5 publications

(3 citation statements)

References 39 publications

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“…The absorption pattern of the 2D–3D perovskite confirms the presence of both 2D and 3D perovskites in the film. 43–45,53,54,68,69…”

Section: Resultsmentioning

confidence: 99%

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A bromide substituted 2D additive for stable and efficient perovskite photovoltaics

Abbas,

Hussain,

Zhang

et al. 2024

Phys. Chem. Chem. Phys.

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“…The absorption pattern of the 2D–3D perovskite confirms the presence of both 2D and 3D perovskites in the film. 43–45,53,54,68,69…”

Section: Resultsmentioning

confidence: 99%

“…The absorption pattern of the 2D-3D perovskite confirms the presence of both 2D and 3D perovskites in the film. [43][44][45]53,54,68,69 Bandgaps of these perovskite materials are estimated from the Tauc plot utilizing the same UV-visible spectra (Fig. S2b, ESI †).…”

Section: Photo-absorption and Emission Behaviours Of Perovskite Filmsmentioning

confidence: 99%

A bromide substituted 2D additive for stable and efficient perovskite photovoltaics

Abbas,

Hussain,

Zhang

et al. 2024

Phys. Chem. Chem. Phys.

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show abstract

“…In this surface regulation process, the polymeric molecule (PY-IT) significantly reduces the defect states and facilitates charge transport, while the polymeric linkers regulate the crystal grain orientation [30]. Yue et al investigated the passivation of deep defect states and band energy alignment in perovskite by developing an in situ 2D perovskite phase on 3D perovskite, where diethylammonium iodide chemically interacted with lead iodide to form a 2D/3D phase [31]. Transition of the perovskite phase, ion migration, and degradation triggered due to residual tensile strain within perovskites limit the performance of PSCs.…”

Section: Introductionmentioning

confidence: 99%

Controlled Crystal Growth of All-Inorganic CsPbI2.2Br0.8 Thin Film via Additive Strategy for Air-Processed Efficient Outdoor/Indoor Perovskite Solar Cells

Bahadur,

Ryu,

Cho

et al. 2023

Nanomaterials

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The evolution of defects during perovskite film fabrication deteriorates the overall film quality and adversely affects the device efficiency of perovskite solar cells (PSCs). We endeavored to control the formation of defects by applying an additive engineering strategy using FABr, which retards the crystal growth formation of CsPbI2.2Br0.8 perovskite by developing an intermediate phase at the initial stage. Improved crystalline and pinhole-free perovskite film with an optimal concentration of FABr-0.8M% additive was realized through crystallographic and microscopic analysis. Suppressed non-radiative recombination was observed through photoluminescence with an improved lifetime of 125 ns for FABr-0.8M% compared to the control film (83 ns). The champion device efficiency of 17.95% was attained for the FABr-0.8M% PSC, while 15.94% efficiency was achieved in the control PSC under air atmospheric conditions. Furthermore, an impressively high indoor performance of 31.22% was achieved for the FABr-0.8M% PSC under 3200 K (1000 lux) LED as compared to the control (23.15%). With a realistic approach of air processing and controlling the crystallization kinetics in wide-bandgap halide PSCs, this investigation paves the way for implementing additive engineering strategies to reduce defects in halide perovskites, which can further benefit efficiency enhancements in outdoor and indoor applications.

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A Universal Ternary Solvent System of Surface Passivator Enables Perovskite Solar Cells with Efficiency Exceeding 26%

Zhang,

Huang,

Yang

et al. 2024

Advanced Materials

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Surface passivation is a vital approach to improve the photovoltaic performance of perovskite solar cells (PSCs), in which the passivator solvent is an inevitable but easy‐ignored factor on passivation effects. Herein, a universal ternary solvent system of surface passivators is proposed through comprehensively considering the solubility and selective perovskite dissolution of the solvent to maximize the passivation effect. Tetrahydrothiophene 1‐oxide (THTO) is selected as the passivation promoter by comparing the binding energy with perovskite and the ability to distort the perovskite lattice among various aprotic polar solvent molecules, which can facilitate the passivator's reaction with perovskite and achieve sufficient passivation on perovskite surface. Besides, chlorobenzene (CB) is used as the diluting agent to minimize the amount of isopropanol (IPA), inhibiting the additional solvent‐induced defects. As a result, the planar PSCs achieve a power conversion efficiency (PCE) of 26.05%, (certificated 25.66%). Besides, the unencapsulated devices exhibit enhanced stability, which can maintain 95.23% and 95.68% of their initial PCE after 2000 h of storage in ambient air and 800 h of light‐soaking in N2‐glovebox. Moreover, this ternary solvent system also exhibits a well applicability and reliability in different passivator such as PEAI, BAI, and so on.

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In situ surface regulation of 3D perovskite using diethylammonium iodide for highly efficient perovskite solar cells

Abstract: Surface passivation by constructing 2D/3D structure is considered as an effective strategy to suppress non-radiative recombination and improve device efficiency and stability. Herein, the 2D perovskite is in-situ formed on...

Cited by 5 publications

References 39 publications

A bromide substituted 2D additive for stable and efficient perovskite photovoltaics

A bromide substituted 2D additive for stable and efficient perovskite photovoltaics

Controlled Crystal Growth of All-Inorganic CsPbI2.2Br0.8 Thin Film via Additive Strategy for Air-Processed Efficient Outdoor/Indoor Perovskite Solar Cells

A Universal Ternary Solvent System of Surface Passivator Enables Perovskite Solar Cells with Efficiency Exceeding 26%

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