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A Review: Crystal Growth for High-Performance All-inorganic Perovskite Solar Cells
摘要： Recently, halide perovskites have become one of the most promising materials for solar cells owing to their outstanding photoelectric performance. Among them, metal halide all-inorganic perovskites (CsPbX3; where X denotes a halogen) show superior thermal and light stability. In particular, the power conversion efficiency (PCE) of perovskite solar cells (pero-SCs) based on a CsPbX3 active layer has shown a steady increase from 2.7% to 19.03% with the improvement of the CsPbX3 crystal quality. In this review, we summarize methodologies that have been employed for controlling the growth of all-inorganic perovskite films so far, including precursor solution deposition, substrate modification, composition doping, and surface engineering. Furthermore, we discuss the effect of perovskite crystal characteristics on defects and perovskite film morphology, both of which are closely related to device performance. Finally, conclusions and perspectives are presented along with useful guidelines for developing all-inorganic pero-SCs with high PCE and robust stability.
关键词： light stability,halide perovskites,precursor solution deposition,all-inorganic perovskites,surface engineering,substrate modification,thermal stability,power conversion efficiency,CsPbX3,composition doping,solar cells,crystal growth
更新于2025-09-23 15:21:01
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Tailoring Component Interaction for Aira??Processed Efficient and Stable Alla??Inorganic Perovskite Photovoltaic
摘要： All-inorganic lead halide perovskites with potential stability improvement is promising candidate for optoelectronic applications. However, fundamental questions remain over the component interaction in the perovskite precursor solution due to the limitation of the most commonly used solvents of N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Here, we report a simple and very effective interaction tailoring strategy for all-inorganic CsPbI3-xBrx perovskites by involving ionic liquid solvent methylammonium acetate (MAAc). We found that C=O has strong interaction with lead (Pb2+) and the N-H…I hydrogen bonds formation are observed. The interaction enables the stable perovskite precursor solution and allows the high-quality production of pinhole-free, large grain size, and flat all-inorganic perovskite films by retarding the crystallization. With a one-step, without the necessity for antisolvent treatment, air-processing approach regardless of humidity, the corresponding photovoltaic cell exhibits a high efficiency of 17.10% along with long operation stability over 1500 h under continuous light illumination.
关键词： photovoltaic,component interaction,all-inorganic perovskites,stability,ionic liquid solvent
更新于2025-09-23 15:21:01
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Lead (II) Propionate Additive and A Dopant-Free Polymer HTM for CsPbI2Br Perovskite Solar Cells
摘要： All-inorganic perovskites (CsPbI3 and CsPbI2Br), owing to their greater thermal stability compared to organic-inorganic hybrid perovskites, are becoming popular in perovskite photovoltaics but the problem that remains with CsPbI2Br (or CsPbI3) is the humidity-assisted phase transformation. Herein, we report about the formation of CsPbI2Br α-phase and improvement of its phase stability under ambient atmosphere (20-30 % relative humidity) by Pb (II) propionate additive in the CsPbI2Br precursor. Solar cells employing CsPbI2Br film with an optimum concentration of the additive (1 mol %), and a donor-acceptor type polymer (synthesized by us) as dopant-free hole transport material that has a better energy level matching with CsPbI2Br (compared to other polymers like P3HT, PTAA, asy-PBTBDT) work with a champion power conversion cell efficiency of 14.58 %. A continuous increase in the open-circuit voltage, reaching 1.36 V for 5 mol % of Pb (II) propionate manifests a remarkable defects-passivation effect by the additive.
关键词： Pb (II) propionate,All-inorganic perovskites,dopant-free hole transport material,solar cells,CsPbI2Br
更新于2025-09-23 15:19:57
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Soft Lattice and Defect Covalency Rationalize Tolerance of ?2a??CsPbI3 Perovskite Solar Cells to Native Defects
摘要： Although all-inorganic lead halide perovskite solar cells have shown tremendous improvement over the past few years, they are still inferior to the hybrid organic-inorganic perovskites in the solar power conversion efficiency. Recently, a conceptually new β-CsPbI3 perovskite has demonstrated an impressive 18.4% efficiency combined with good thermodynamic stability at ambient conditions. We use ab initio non-adiabatic molecular dynamics to show that native point defects in β-CsPbI3 are generally benign for nonradiative charge recombination, regardless of whether they introduce shallow or deep trap states. Moreover, formation of new covalently bound species in the presence of defects slows down the recombination. These results indicate that halide perovskites do not follow the simple models used to explain defect-mediated charge recombination in the conventional semiconductors. The strong tolerance of electron-hole recombination against defects arises due to the softness of the perovskite lattice, which permits separation of electrons and holes upon defect formation, and allows only low-frequency vibrations to couple to the electronic subsystem. Both factors decrease significantly the non-adiabatic coupling and slow down the dissipation of electronic energy to heat. We suggest that a halide-rich synthesis environment may further improve the efficiency, and propose that strong defect tolerance is general to metal halide perovskites because they exhibit much lower bulk moduli compared to the conventional semiconductors used in photovoltaic, photocatalytic, electrocatalytic, lasing, light-emitting, detecting and other opto-electronic devices.
关键词： Electron-phonon coupling,Nonradiative recombination,All-inorganic perovskites,Time-dependent density functional theory,Defects
更新于2025-09-19 17:13:59
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All-inorganic Lead Halide Perovskites: A Promising Choice for Photovoltaics and Detectors
摘要： Recent years have witnessed a significant performance breakthrough in all-inorganic perovskite solar cells, but their power conversion efficiencies are still far lower than a theoretical limit and they also suffer from severe moisture instabilities. Based on the discussions on crystal structures, chemical bonds, and optical and electrical properties of all-inorganic perovskites, we have summarized their comprehensive applications in solar cells and detectors. The effects of monovalent and divalent ion doping, morphology, crystallization control and interface engineering on device performance and stability have been carefully evaluated. Narrow-bandgap CsPbI3 polycrystalline bulk film solar cell has achieved the highest power conversion efficiency of 18.4%, while stable CsPbBr3 nanocrystal film is a more successful choice in UV-visible and high-energy ray detections. Finally, we call on boosting the performance and stability of solar cells and shortening response time for tandem photovoltaic and high-speed dynamic detection applications, respectively.
关键词： polycrystalline bulk films,solar cells,All-inorganic perovskites,photodetectors,nanocrystal films
更新于2025-09-11 14:15:04