Bandgap tuning of a CsPbBr₃ perovskite with synergistically improved quality via Sn²⁺ doping for high-performance carbon-based inorganic perovskite solar cells

Abstract

Narrowing the bandgap and promoting the quality of inorganic perovskites are the key points to improve the performance of inorganic perovskite solar cells. Herein, we incorporate Sn2+ into inorganic CsPbBr3...

Application of Carbon Materials in Conductive Electrodes for Perovskite Solar Cells

“…To improve the photoelectric performance and stability of all-inorganic carbon-electrode PSCs, our group have carried out studies on the optimizing the substrate temperature, [103] interface modification with polymers, [104] perovskite crystallization engineering, [50,[105][106][107] and energy level alignment. [108] The performance parameters of PSCs with graphite electrodes are summarized in Table 1.…”

Limitations and Progresses in Carbon‐Based Cesium Lead Halide Perovskite Solar Cells

“…In doping strategies, dopants are usually introduced in perovskite precursor solutions, and the incorporation of dopants is realized in the perovskite crystallization process. Nowadays, various cations have been demonstrated, including homovalent doping, such as Mg 2 + (72 pm), [68] Mn 2 + (80 pm), [69] Zn 2 + (74 pm), [70] Sr 2 + (113 pm), [71] Cd 2 + (97 pm), [72] Sn 2 + (93 pm), [73] Eu 2 + (109 pm), [74] as well as heterovalent doping, such as In 3 + (81 pm), [75] Sb 3 + (92 pm), [76] La 3 + (106 pm), [77] Sm 3 + (96 pm), [78] Tb 3 + (92 pm), [79] Nb 5 + (64 pm), [80] etc. Beneficial effects mainly include the following aspects.…”

“…Therefore, band structure and corresponding optoelectronic properties, such as bandgap, incident light harvest, and carrier transportation, etc., can be modulated by B-site cationic doping. For example, Mn-doped CsPbIBr 2 (Figure 4b), [69] Sn-doped CsPbIBr 2 [73] and In-doped CsPbI x Br 3À x [75] demonstrate rather obvious redshift of corresponding perovskites. This is beneficial for the broadened photoresponse.…”

Ionic Liquid Surface Treatment-Induced Crystal Growth of CsPbIBr2 Perovskite for High-Performance Solar Cells

“…In contrast, CsPbBr 3 perovskite exhibits a superior ambient stability. Nevertheless, the wide bandgap of 2.3 eV for CsPbBr 3 perovskite leads to an undesirable light harvesting threshold. − Fortunately, CsPbIBr 2 perovskite possesses a suitable bandgap (∼2.05 eV) and shows good phase stability in ambient condition, which make CsPbIBr 2 perovskite a good choice for solar cells after balancing the stability and bandgap. , In the past several years, CsPbIBr 2 PSCs have attained considerable achievements with increasing PCE from 4.7% to over 12% through the interface engineering and additive engineering. − Nonetheless, the performance of PSCs based on CsPbIBr 2 perovskite is still far behind its theoretical value and inferior to that of other analogues. The inferior performance of CsPbIBr 2 PSCs can be ascribed to the poor perovskite layer quality caused by a fast and uncontrollable crystallization process, resulting in severe charge recombination and large energy loss in PSCs.…”