Research Progress in the Stability of Inorganic Perovskite Solar Cells

Abstract

In recent years, the efficiency of perovskite solar cells has developed rapidly, but its stability is limited by the influence of heat, light and water. All-inorganic perovskite formed by inorganic cations instead of organic cations shows improved thermal stability, high light absorption and adjustable band gap. The photoelectric conversion efficiency of all-inorganic perovskite solar cells has been improved to 19.03% at present. Among them, CsPbI 3 perovskite solar cells have good photoelectric performance but poor stability, while CsPbBr 3 perovskite solar cells have excellent stability but poor photoelectric performance of devices. In this paper, the influence of preparation method, film doping and interface modification on the stability of inorganic perovskite solar cells is systematically summarized. The reasons behind the instability of inorganic perovskite and the improvement methods are emphatically analyzed. In conclusion, improving the stability of inorganic perovskite light absorbing materials by film doping, surface passivation and morphology control such as low dimensional materials preparation can effectively improve the stability of the overall device, which provides the basis for further commercialization. In addition, it is of great significance to study the theory of charge transfer and recombination and establish a complete theoretical system for improving the performance and stability of the device. At present, most of perovskite contains harmful elements Pb. How to replace Pb and find new materials applied in perovskite solar cells is also the future development trend. In a word, as a new type of solar cell, inorganic perovskite solar cell is expected to contribute to the photovoltaic development of the future society.

Passivation and process engineering approaches of halide perovskite films for high efficiency and stability perovskite solar cells

“…In particular, PSCs tend to degrade when exposed to environmental oxygen and moisture, heating and light illumination, and mechanical stress. [9][10][11][12][13][14][15][16][17][18][19][20] The degradation of PSCs in a humid environment originates from the amine salt precursors' hygroscopic nature, such as methyl ammonium or formamidinium halides, used for the perovskite preparation. 21 These salts facilitate the adsorption of water molecules from the surrounding environment, resulting in hydrate products.…”

“…Efficiency stabilization has been heavily investigated in recent years, as proven by many research articles summarised in recently published reviews 6,[9][10][11][12][13][14][15][16][17][18][19][20][21] . Device encapsulation sufficiently prevents environmental-induced degradation of the perovskite absorber or the electrodes.…”

Efficient (>20 %) and Stable All‐Inorganic Cesium Lead Triiodide Solar Cell Enabled by Thiocyanate Molten Salts

“…[10][11][12][13][14][15] Alternatively,black-phase all-inorganic cesium lead triiodide (CsPbI 3 )i sa ni deal perovskite candidate with E g of about 1.67 eV,w hich does not have any volatile component and exhibits highly thermal and photoelectrical stabilities. [16][17][18][19][20] TheCsPbI 3 solar cell has already been ahot research topic in recent years owing to these advantages and impressive progresses.The performance enhancement of the CsPbI 3 solar cell mainly benefits from two aspects,o ne is the utilization of dimethylammonium iodide (DMAI) or DMAP-bI 3 to tune intermediate phase and crystallization processes of the CsPbI 3 ,w hich helps to achieve pure and stable CsPbI 3 black phase with relatively low annealing temperature. [21][22][23][24][25][26] Theo ther one is the surface passivation toward the CsPbI 3 layer by introducing long-chain organic ammonium halides, such as octylammonium iodide,p henyltrimethylammonium chloride and choline iodide.…”

CsPbI3 Perovskite Quantum Dots: Fine Purification and Highly Efficient Light-emitting Diodes

“…. 相比于有机-无机杂化钙钛矿, 全无机 CsPbX 3 量 子点展现出更好的光稳性和热稳性, 具有更大的发展潜 力 [7][8] . 自 2015 年宋等 [9] 首次报道了基于全无机钙钛矿 的量子点发光二极管(QLED)以来, 经过近 5 年的发展, QLED 的性能已经取得了重大的突破 [10][11] .…”