CsPbIBr₂ Perovskite Solar Cell by Spray-Assisted Deposition

Abstract

In this work, an inorganic halide perovskite solar cell using a spray-assisted solution-processed CsPbIBr2 film is demonstrated. The process allows sequential solution processing of the CsPbIBr2 film, overcoming the solubility problem of the bromide ion in the precursor solution that would otherwise occur in a single-step solution process. The spraying of CsI in air is demonstrated to be successful, and the annealing of the CsPbIBr2 film in air is also successful in producing a CsPbIBr2 film with an optical band gap of 2.05 eV and is thermally stable at 300 °C. The effects of the substrate temperature during spraying and the annealing temperature on film quality and device performance are studied. The substrate temperature during spraying is found to be the most critical parameter. The best-performing device fabricated using these conditions achieves a stabilized conversion efficiency of 6.3% with negligible hysteresis. Cesium metal halide perovskites remain viable alternatives to organic metal halide perovskites as the cesium-containing perovskites can withstand higher temperature.

All‐Vacuum‐Deposited Stoichiometrically Balanced Inorganic Cesium Lead Halide Perovskite Solar Cells with Stabilized Efficiency Exceeding 11%

“…[15] In this communication, we show that, by replacing organic halides with cesium halides, common vacuum deposition techniques can be applied smoothly to the fabrication of perovskite solar cells. [16][17][18] Furthermore, their high open-circuit voltage (V oc ) makes them very suitable as dim-light energy harvesters. By combining these films with vacuum-sublimed hole and electron transport layers (HTLs and ETLs), efficient all-vacuum-deposited CsPbI 3 and CsPbI 2 Br solar cells were made.…”

“…[8,[12][13][14] Another way to unlock the full potential of vacuum deposition for the fabrication of perovskite films entails the use of precursors without gas-like properties. [16][17][18] Furthermore, their high open-circuit voltage (V oc ) makes them very suitable as dim-light energy harvesters. Cesiumbased perovskite thin films, CsPbI 3 (band gap, E g , of 1.72 eV), and CsPbI 2 Br (E g = 1.82 eV), with intriguing morphological and photophysical properties were obtained.…”

Phase Segregation Enhanced Ion Movement in Efficient Inorganic CsPbIBr2 Solar Cells

“…This limits the short circuit current of mixed halide cesium lead PSCs when used in single-junction configurations. [17] In this work, a gas-assisted method is used to form CsP-bIBr 2 thin films on fluorine-doped tin oxide (FTO) glass substrates. 8% among inorganic perovskite solar cells.…”

Morphology Controlling of All‐Inorganic Perovskite at Low Temperature for Efficient Rigid and Flexible Solar Cells

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organic components with inorganic cations such as cesium (Cs + ) and rubidium (Rb + ) ions can effectively improve the thermal stability. [24][25][26][27][28][29][30] To improve the performance of CsPbX 3 -based PSCs, a series of work on composition [18,19] and fabrication [20][21][22][23][24] engineerings have been intensely carried out. The CsPbI 2 Br perovskites, which possess a reasonable bandgap of 1.9 eV and considerable phase stability, were emphasized as the main research subject in previous work.

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