Highly electroluminescent and stable inorganic CsPbI2Br perovskite solar cell enabled by balanced charge transfer

Duan, Chenghao; Li, Jiong; Liu, Zidan; Wen, Qiaoyun; Tang, Huiling; Yan, Keyou

doi:10.1016/j.cej.2020.128053

Cited by 28 publications

(26 citation statements)

References 58 publications

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“…The diffraction peak of fluorine-doped tin oxide (FTO) glass at 26.2° was used as a reference to correct all the patterns. The XRD patterns show that all the films are β-phase with four main peaks at 14.7, 20.9, 23.4 and 29.5° assigned to the (110), (111), (210), and (220) planes of the tetragonal phase, respectively [ 29 , 30 ]. Figure 1 c–e show the evolution of XRD peak intensity and full width at half maximum (FWHM) of perovskite films prepared at different ambient temperatures.…”

Section: Resultsmentioning

confidence: 99%

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

Liu

Zhang

et al. 2021

Molecules

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Inorganic cesium lead halide perovskites, as alternative light absorbers for organic–inorganic hybrid perovskite solar cells, have attracted more and more attention due to their superb thermal stability for photovoltaic applications. However, the humid air instability of CsPbI2Br perovskite solar cells (PSCs) hinders their further development. The optoelectronic properties of CsPbI2Br films are closely related to the quality of films, so preparing high-quality perovskite films is crucial for fabricating high-performance PSCs. For the first time, we demonstrate that the regulation of ambient temperature of the dry air in the glovebox is able to control the growth of CsPbI2Br crystals and further optimize the morphology of CsPbI2Br film. Through controlling the ambient air temperature assisted crystallization, high-quality CsPbI2Br films are obtained, with advantages such as larger crystalline grains, negligible crystal boundaries, absence of pinholes, lower defect density, and faster carrier mobility. Accordingly, the PSCs based on as-prepared CsPbI2Br film achieve a power conversion efficiency of 15.5% (the maximum stabilized power output of 15.02%). Moreover, the optimized CsPbI2Br films show excellent robustness against moisture and oxygen and maintain the photovoltaic dark phase after 3 h aging in an air atmosphere at room temperature and 35% relative humidity (R.H.). In comparison, the pristine films are completely converted to the yellow phase in 1.5 h.

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Section: Resultsmentioning

confidence: 99%

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

Liu

Zhang

et al. 2021

Molecules

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“…Based on the theoretical discussions, it is possible to fabricate highly efficient PV/electroluminescent (PV/EL) perovskite bifunctional devices (PBDs), as suggested by Duan's group. [ 111 ] In this process, a bifacial modification strategy was developed by introducing 5‐aminovaleric acid hydrobromide (5‐AVABr) to post‐treat the perovskite layer and fullerene–ethylenediamine derivatives (C60‐EDA and C70‐EDA) to pretreat SnO 2 ETL. It was found out that the introduction of C60‐EDA and C70‐EDA into SnO 2 significantly improved the energy‐level calibration of the device, which further facilitated in improving the charge extraction and injection and suppressing the nonradiative recombination of photocarriers.…”

Section: Cspbi2br Pscsmentioning

confidence: 99%

“…Reproduced with permission. [ 111 ] Copyright 2020, Elsevier. b) Schematics of the CsPbI 3 QDs with and without SCN capping, following the elimination of the ligand chain from the QD surface using saturated Pb(OAc) 2 EA solution.…”

Section: Cspbi2br Pscsmentioning

confidence: 99%

All‐Inorganic CsPbI₂Br Perovskite Solar Cells: Recent Developments and Challenges

et al. 2021

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In the past decade, organic–inorganic halide perovskites (OIHPs) perovskite solar cells (PSCs) have received gigantic research attention owing to their prompt development in power conversion efficiency (PCE) from the initial 3.8% for the first prototype in 2009 to the present state‐of‐the‐art value of 25.5%. However, due to the weak‐bonded organic components in the hybrid crystal structure, the intrinsic chemical instability of OIHPs persuaded by humidity, ultraviolet light, and heat remain a challenging issue for them to meet industrialization‐specific requirements. Parallel to the flourishing of OIHPs, the progress of inorganic cesium‐based metal halide PSCs (CsPbX3, X = I, Br, and mixed) is hastening with PCEs over 20%. Due to its excellent stability under thermal and high humidity conditions, CsPbI2Br is one of the most fascinating inorganic perovskites and a notable research hotspot in the field of perovskite photovoltaics (PV). Herein, recent developments of CsPbI2Br‐based PSCs including the optoelectronic properties, processing methods for preparing CsPbI2Br films, stability of devices, and efficiency improvements are reviewed and deliberated. Finally, cutting‐edge engineering approaches for optimizing the PV performance are discussed and new challenges and perspectives for future research in this field are recognized.

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“…Yan et al pre‐treated a SnO 2 ETL with fullerene–ethylenediamine derivatives and a perovskite layer with 5‐aminovaleric acid hydrobromide (5‐AVABr), resulting in the high performance of dual‐functional PLESCs (Figure 12j). [ 56 ] Pre‐post treatments can balance the charge transfer for efficient injection and extraction, respectively. The optimized dual‐functional device obtained a PCE of 16.58% with a V OC of 1.32 in the solar cell mode and an electroluminescence EQE of 6.2% in the LED mode (Figure 12k–m).…”

Section: Energy Band Alignment In Plescsmentioning

confidence: 99%

Recent Progress in Perovskite‐Based Reversible Photon–Electricity Conversion Devices

Liang

Xia

Mei

et al. 2021

Adv Funct Materials

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Solution‐processed metal halide perovskites have the advantages of a tunable bandgap, excellent charge transport properties, and suitable exciton binding energy. They therefore emerge as promising semiconductors for efficient perovskite solar cells (PSCs) and bright perovskite light‐emitting diodes (PLEDs). In addition, these devices possess a similar planar–heterojunction architecture, thus novel dual‐functional perovskite light‐emitting solar cells (PLESCs) that can realize electrical‐to‐optical and optical‐to‐electrical conversion on one device are developed. To date, high‐performance PLESCs with 17.2% electroluminescence external quantum efficiency and 25.2% power conversion efficiency are achieved using a holistic optimization approach. However, a comprehensive review focusing on dual‐functional PLESCs with discussion on their development and limitations, remains lacking. Herein, the rapid progress in PLESCs, including 0D quantum dot, 2D Ruddlesden–Popper, and 3D bulk perovskite devices, is reviewed. First, the fundamental understanding of the device structure and working principle of PLESCs is overviewed. Second, the state‐of‐the‐art developments for simultaneously achieving high‐efficiency PSCs and PLEDs, focusing on defect passivation, interface optimization, energy level alignment, and dimensional control, are comprehensively summarized. Finally, the authors offer some perspectives for future trends in the development of promising PLESCs, which can provide guidelines for this emerging field.

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Highly electroluminescent and stable inorganic CsPbI2Br perovskite solar cell enabled by balanced charge transfer

Cited by 28 publications

References 58 publications

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

All‐Inorganic CsPbI₂Br Perovskite Solar Cells: Recent Developments and Challenges

Recent Progress in Perovskite‐Based Reversible Photon–Electricity Conversion Devices

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Highly electroluminescent and stable inorganic CsPbI2Br perovskite solar cell enabled by balanced charge transfer

Cited by 28 publications

References 58 publications

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

Ambient Air Temperature Assisted Crystallization for Inorganic CsPbI2Br Perovskite Solar Cells

All‐Inorganic CsPbI2Br Perovskite Solar Cells: Recent Developments and Challenges

Recent Progress in Perovskite‐Based Reversible Photon–Electricity Conversion Devices

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All‐Inorganic CsPbI₂Br Perovskite Solar Cells: Recent Developments and Challenges