Mixed‐Halide Inorganic Perovskite Solar Cells: Opportunities and Challenges

Abstract

Recently, mixed‐halide inorganic CsPbI3−xBrx perovskite solar cells (PSCs) have had a rapid advancement, which offers balanced efficiency, stability, tunable bandgap, and potential for indoor photovoltaic applications. Despite these advantages, significant challenges remain in the phase segregation phenomena, trap state density, and absorption range limitations. This review presents an analysis of the crystal and electronic structure and optical properties of CsPbI3−xBrx, as well as an in‐depth look at high‐quality CsPbI3−xBrx film preparation, phase segregation inhibition potential solutions, and interface engineering, highlighting the critical role of interface modification in the performance of CsPbI3−xBrx PSCs. Furthermore, how CsPbI3−xBrx PSCs can be strong candidates for indoor photovoltaics because of their adjustable bandgap that enables them to better match the absorption range and notable strength stability is discussed. Finally, the review provides perspectives to address the development bottlenecks and inspires future research prospects concerning CsPbI3−xBrx PSCs.

High-efficiency top-emitting organic light-emitting diodes based on metal/ITO composite electrodes

“…The strategy of developing composite electrodes, including laminated metal, metal/metal oxide, metal/ metal nitride, and metal/transparent conductive oxide (such as metal/ITO) composite structures, have been widely adopted as anode in OLEDs, as well as in perovskite solar cells [14][15][16][17]. The properties of the reflective component in the composite anode are crucial for achieving highly efficient TEOLEDs.…”

Instability of Formamidinium Lead Iodide (FAPI) Deposited on a Copper Oxide Hole Transporting Layer (HTL)

“…Since hybrid perovskites started to attract much more attention in the field of photovoltaic technology due to their unique properties, such as high efficiency, high carrier mobility, good optical properties, and large absorption coefficients, − many researchers began to look for methods to reduce the production cost of perovskite solar cells and to improve their stability. − One of many approaches to increase perovskite stability is to replace the organic hole transport layer (HTL), which becomes highly unstable when exposed to air for a long time, with a more stable inorganic material. , Copper oxide with its favorable electronic properties, thermal stability, and cost-effectiveness emerges as an attractive candidate for replacing traditional organic HTLs . Its intrinsic p-type conductivity allows for efficient hole extraction from the perovskite layer to the electrode, thus reducing recombination losses. − What is more, copper oxide exhibits enhanced resistance to moisture and oxygen, the two factors that contribute to the perovskite degradation.…”