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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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Exploring RGB Light‐Activated Degradation of Perovskite Films and Solar Cells for Near Space Application
摘要： Hybrid perovskite solar cells with high specific power have great potential of becoming a promising power source mounted on spacecraft in space application. However, there is a lack of study on their photostability as light absorber at the condition. Here, we explore the stability of the perovskite films and solar cells under RGB light illumination in the medium vacuum that belongs to near space. The perovskite active layers exhibit the different degradations from morphological, chemical and structural point of view. This is attributed to the strong coupling between photoexcited carriers and the crystal lattice, and the diversity of RGB light absorption in the perovskite films. Device characterizations reveals that the efficiency loss of perovskite solar cells results from not only the perovskite degradation, but also the photoexcited carriers reducing the energy barrier of ion migration and accelerating the migration to generate more deep-level trap defects. Moreover, comparative devices suggest that the well encapsulation could weaken the effect of the vacuum on the stability.
关键词： perovskite solar cell,RGB light,stability,photoinduced degradation,near space
更新于2025-09-12 10:27:22
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Dual Functions of Crystallization Control and Defect Passivation Enabled by an Ionic Compensation Strategy for Stable and High-Efficient Perovskite Solar Cells
摘要： The fabrication of perovskite films with high crystallization quality, less defects and fewer grain boundaries (uncoordinated ions), is one critical step to obtain excellent power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). In this work, we develop a novel method to control the perovskite growth toward better crystallinity and less defects using I- and thiourea as additives for the first time (we define ITU for I- and thiourea). Grain boundaries in the perovskite films are significantly reduced compared with the traditional method. Moreover, concentration of the defects in perovskite films is decreased by nearly one-half. Based on high-quality films, the PSCs with a champion PCE of 20.39% present a stabilized output efficiency of 19.26% under one sun illumination compared with that of the control devices (17.75%). The devices also exhibit small hysteresis and excellent long-term and light stability. The devices can retain 80% of the initial PCE after 100 h of light soaking or 30 days of aging in ambient atmosphere. This work not only demonstrates a novel approach to passivate the defects by balancing iodide ions, but also offers a strategy to control the perovskite film growth, which can be widely used in photoelectric devices.
关键词： iodide ions,crystallinity,defect states,perovskite solar cells,light stability
更新于2025-09-12 10:27:22