Healing soft interface for stable and high-efficiency all-inorganic CsPbIBr2 perovskite solar cells enabled by S-benzylisothiourea hydrochloride

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr2 Perovskite Solar Cells

“…[12] Among them, CsPbBr 3 perovskite has the best environmental tolerance, [13,14] CsPbI 3 perovskite has the highest PCE, [15] and CsPbIBr 2 perovskite is considered as a potential material for practical applications with both high efficiency and stability, especially in tandem photovoltaics. [16,17] However, many issues including cost control, poor stability, lead toxicity, and low water resistance are stumbling blocks on the commercial road for PSCs. [18][19][20] In this case, carbon-based all-inorganic PSC has been proposed and widely concerned.…”

Ternary Halogen Doping for Efficient and Stable Air‐Processed All‐Inorganic Perovskite Solar Cells

“…[ 26 ] However, the currently adopted fabrication processes of all‐inorganic CsPbI 3 perovskite film are strictly in an inert atmosphere to ensure the production of high‐performing PSCs, which greatly impedes their feasibility in large‐scale production. Recently, Br‐based all‐inorganic perovskites have also been investigated due to the superior stability and high open‐circuit voltage the device could achieve, [ 27–33 ] suggesting the great potential of halogen‐doping strategy in enhancing the stability of all‐inorganic perovskites. Recently, our group has reported an air‐processed all‐inorganic CsPbI 3− x Br x PSCs using ionic liquid methylammonium acetate (MAAc) as precursor solvent, where the tailored Pb‐O interaction and the N–H…I hydrogen bonds between MAAc and PbI 2 are shown to retard the crystallization process and stabilize the formation of high‐quality CsPbI 3− x Br x film in air.…”

“…[26] However, the currently adopted fabrication processes of all-inorganic CsPbI 3 perovskite film are strictly in an inert atmosphere to ensure the production of high-performing PSCs, which greatly impedes their feasibility in large-scale production. Recently, Br-based allinorganic perovskites have also been investigated due to the superior stability and high open-circuit voltage the device could achieve, [27][28][29][30][31][32][33] suggesting the great potential of halogen-doping strategy in enhancing the stability of all-inorganic perovskites.…”

Panchromatic oxasmaragdyrin as dual functional hole‐transporting material in all‐inorganic CsPbIBr2 perovskite solar cells

“…Nonetheless, CsPbIBr 2 PSCs still suffer from several shortages such as low film coverage and high defect density and hence require additional optimizations. Various literature has reported different approaches to improve active layers, [7][8][9][10][11][12][13] for example, complementing the perovskite active layer with organic dopants such as poly(ethylene glycol), cellulose acetate, or organic iodic salts etc. [14][15][16] Other than modifications of the active layers, engineering transporting layers to improve the efficiency of CsPbIBr 2 -based PSCs has been addressed.…”