Material, Phase, and Interface Stability of Photovoltaic Perovskite: A Perspective

Abstract

The past decade has witnessed the unprecedented boost of power conversion efficiency (PCE) of photovoltaics based on halide perovskite materials since its early discovery. Despite its remarkably good performance, long-term stability is yet one of the last barriers before commercializing halide perovskite photovoltaics is possible. In this perspective, we discuss the challenges and concurrently the strategies regarding the stability of the perovskite materials, photoactive crystal phases, and the performance as well as stability limiting interfaces. Future perspectives of stable halide perovskite and perovskite solar cells are also proposed to shine light on letting perovskite technology satisfy long-term operation warranty.

Comparison of Glass–Glass versus Glass–Backsheet Encapsulation Applied to Carbon-Based Perovskite Solar Cells

“…The literature reveals that the choice of perovskite absorber is also crucial for the heat and moisture resistance of the photovoltaic devices [17]. The perovskite absorber used here is a (MAPbI 3 ), (AVAI) 0 .…”

Thermal degradation in methylammonium–formamidinium–guanidinium lead iodide perovskites

“…[1][2][3][4][5][6][7][8][9] Despite the unprecedented success in inexpensive laboratory applications, the low stability of halide perovskite materials and devices is one of the main bottlenecks for their definitive commercial usage. [10][11][12] Among the possible degradation stressors are humidity, oxygen, light, high temperatures and thermal stresses, bias voltages, and interfacial reactions between layers in perovskite devices. [13][14][15] At present, the longest-lasting halide perovskite solar cell possesses a predicted lifetime of about five years under continuous operation at 35 1C, 16 much lower than the desired times of at least 10 years, without even considering that humidity, light, and temperature fluctuations in real conditions could reduce this value.…”

Mimicking Natural Antioxidant Systems for Improved Photostability in Wide-Band-Gap Perovskite Solar Cells

“…iodine/bromine ratio in the benchmark MAPb­(I 1– x Br x ) 3 perovskite, it is possible to modulate the band gap from 1.55 to 2.3 eV. − Despite the relative simplicity of achieving the desired value of the band gap and besides the halide segregation phenomenon induced by light irradiation, the mixed halide perovskite materials still suffer from stability issues related to different factors like oxygen, moisture, light, elevated temperature, or their synergic effect which need to be urgently solved. − To overcome or mitigate the stability issues, different approaches have been proposed. Some of them rely on the development of coating materials for the entire device structure, while most of the published work is related to the use of small molecules and polymers as additives, inside the perovskite structure or at the interface between the perovskite film and the underneath or the above hole-/electron-transporting material. − …”