Fabrication of single phase CsPbBr₃ films via in situ metal reaction

Abstract

We developed an in situ metal reaction strategy to fabricate single phase CsPbBr3 films by reacting Pb precursors with a mixture of CsBr and HBr. The purity of the CsPbBr3 film can be controlled by tuning the thickness of sputtered Pb.

DMF‐Based Large‐Grain Spanning Cu2ZnSn(Sx,Se1‐x)4 Device with a PCE of 11.76%

“…Therefore, all the samples are P-type semiconductors. [37,38] As the temperature increases from 350 to 430 °C, the maximum of the photovoltage (V max ), the separation time of the carriers (T t , time at the peak of TSPV curves), and the recombination time of the carriers (T r , time at the beginning of the platform of TSPV curves) increase from 1.24 V, 3.81 × 10 -7 s and 1.12 × 10 -6 s to 4.81 V, 5.02 × 10 -7 s and 2.89 × 10 -6 s, separately (Table 1). In comparison, the increasing degree of T r is bigger than that of T t , which is beneficial to increase the lifetime of carrier transporting at the interface.…”

Covalent Triazine Framework Graphene-like Films Induce Growth of CsPbBr3 Crystals for Efficient Inorganic Perovskite Solar Cells

“…Metal halide perovskite solar cells (PSCs) have made great progress with the unprecedented improvement of power conversion efficiency (PCE) from an initial 3.8% to certified 25.7% in the past decade. − However, PSCs are unstable and easily degraded due to the presence of organic cations such as CH 3 NH 3 + and HNCH­(NH 3 ) + when exposed to light, heat, or moisture. , To address the stability problem, CsPbX 3 (X = I, Br, and Cl) inorganic perovskites are designed by replacing organic cations with cesium ions, which have great potential for future applications owing to their superior stability. − With a bandgap of 2.3 eV and unprecedented thermal and humid stability, CsPbBr 3 PSCs is one of the most promising inorganic solar cells. Recently, many approaches such as ionic liquid passivation, alkyl-chain regulated charge transfer, interfacial strain release, interface engineering, and ion doping strategy, were used to improve the photovoltaic performance of CsPbBr 3 PSCs.…”