Fabrication of lead-free CsBi₃I₁₀ based compact perovskite thin films by employing solvent engineering and anti-solvent treatment techniques: an efficient photo-conversion efficiency up to 740 nm

Abstract

Bismuth based perovskites are emerging as a candidate for photovoltaic application due to their low-toxicity, high structural stability and suitable application in photovoltaic applications. Here in this work, bismuth halide...

Synergistic effects of morphological control and enhanced charge collection enable efficient and stable lead-free CsBi3I10 thin film solar cells

“…16 Recently, Islam and co-workers prepared nickel oxide by spray pyrolysis as a hole transporter in inverted devices in order to improve the crystallinity of CBI thin films, but the devices only attained an efficiency of 0.72%. 12 Some other attempts have been made to optimize the fabrication process and device structures, but most of them relied on traditional spin coating methods and showed inferior performance. 2,10,17–19 Based on previous experiences, one major reason for inferior device performance is the poor film morphology coupled with a high number of defects, which led to insufficient charge collection efficiency at interfaces.…”

“…11 Theoretical simulation has predicted the remarkable optoelectronic properties and promising photovoltaic performance of Bi-based perovskites. 12,13 To date, various compositions including MA 3 Bi 2 I 9 (MA ¼ methylammonium), 14 FA 3 Bi 2 I 9 (FA ¼ formamidinium), 15 Cs 3 Bi 2 I 9 , 13 and ABi 3 I 10 (A ¼ MA + , FA + , Cs + ) 16 have been explored as light absorbers in solar cells. 13 Among these, all-inorganic CsBi 3 I 10 (CBI) represents one of the most promising candidates due to its appropriate band gap (1.77 eV), solution processability and high light absorption, 16 but little attention has been paid to optimizing its material properties and device performance.…”

Antimony Doping of CsBi3I10 for Tailoring the Film Morphology and Defects toward Efficient Lead-Free Thin-Film Solar Cells

“…In contrast, Bi-based analogues demonstrate low toxicity and remarkable stability in air, making them promising candidates for Pb-based alternatives. , To date, various Bi-based materials have been reported, including FA 3 Bi 2 I 9 (FA: formamidinium), MA 3 Bi 2 I 9 (MA: methylammonium), Cs 3 Bi 2 I 9 , and CsBi 3 I 10 . Among them, all-inorganic CsBi 3 I 10 has emerged as one of the most promising photovoltaic materials owing to its good chemical stability, appropriate band gap (1.78 eV), and strong visible light absorption.…”

Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance

“…[15][16][17] In 2016, Johansson's group rstly reported the CsBi 3 I 10 perovskite and its photovoltaic application in the meso-structured device, for which the photocurrent is still observable up to 700 nm and a power conversion efficiency (PCE) of 0.4% was achieved. 15 Later, several groups have focused their studies on enhancing the PCEs of CsBi 3 I 10 solar cells via improving the lm morphologies by adopting various strategies such as composition tuning, 18 solvent engineering, [19][20][21][22][23] and interface engineering. 24 For example, very recently, Zhang's group reported a gas quenching assisted antisolvent method combined with introducing a thiourea Lewis base additive to engineer the lm microstructure.…”

“…Achieving a high-quality thin lm with large crystal grains, uniform coverage and smooth surface remains a big challenge for the CsBi 3 I 10 perovskite, due to its rapid crystallization rate. 16,[18][19][20][21][22][24][25][26] It is therefore necessary to explore new strategies capable of modulating the crystallization kinetics (retarding the crystallization rate), to improve the lm quality and photovoltaic performance of CsBi 3 I 10 .…”