Universal defects elimination for high performance thermally evaporated CsPbBr3 perovskite solar cells

A pressure-assisted annealing method for high quality CsPbBr3 film deposited by sequential thermal evaporation

“…But at present, there are few studies on the fabrication of CsPbBr 3 -PSCs by using vacuum thermal evaporation. [28][29][30][31][32] In our previous work, 33,34 we demonstrated that introducing moderate moisture into the annealing process can help the crystallization of CsPbBr 3 perovskite. Actually, for CsPbBr 3 lm deposited by sequential single-source vacuum deposition, the CsBr can hardly diffuse in the lm to react properly with PbBr 2 in completely "dry condition".…”

All-inorganic CsPbBr3 perovskite: a promising choice for photovoltaics

“…The preparation conditions such as sintering also play an important part for the preparation of compact CsPbBr 3 film with large grains. Xian et al[132] introduced a sequential evaporating technology based on a two-step sintering (TSS) strategy to fabricate to fabricate CsPbBr 3 perovskite films.The TSS strategy which was carried out in a muffle furnace comprises of two steps 1) preparingCsPbBr 3 perovskite at 320 o C, 2) crystal growth of dense CsPbBr 3 films and defects reformation via sintering. Firstly, CsBr and PbBr 2 are thermally evaporated by controlling the evaporation rates onto the substrates in the vacuum chamber.…”

ABX3 inorganic halide perovskites for solar cells: chemical and crystal structure stability

“…The perovskite CsPbBr 3 has a gap band width of nearly to 2.3 eV, in its cubic phase, this is the most stable of the inorganic perovskites at room temperature. It has been reported that photovoltaic devices manufactured with this perovskites exceed the 2000 hours of use, nevertheless, in comparison with CsPbI 3 , it has lower photoconversion efficiency [27][28][29][30][31], that is why the inclusion of Brand Iin the same perovskite ABX 3 (X=Br 3-y , I y ) lead to obtain a structure that presents better efficiencies than those that only have Brand better stability than Iperovskites [32][33][34]. The inclusion in the crystalline network of cations such as K, Zn, Bi, has also been explored to modify the size of the crystallite and favor its stability under environmental conditions.…”