Application of Quantum Dot Interface Modification Layer in Perovskite Solar Cells: Progress and Perspectives

Abstract

Perovskite solar cells (PSCs) are currently attracting a great deal of attention for their excellent photovoltaic properties, with a maximum photoelectric conversion efficiency (PCE) of 25.5%, comparable to that of silicon-based solar cells. However, PSCs suffer from energy level mismatch, a large number of defects in perovskite films, and easy decomposition under ultraviolet (UV) light, which greatly limit the industrial application of PSCs. Currently, quantum dot (QD) materials are widely used in PSCs due to their properties, such as quantum size effect and multi-exciton effect. In this review, we detail the application of QDs as an interfacial layer to PSCs to optimize the energy level alignment between two adjacent layers, facilitate charge and hole transport, and also effectively assist in the crystallization of perovskite films and passivate defects on the film surface.

Recent Advances in Nanostructured Inorganic Hole-Transporting Materials for Perovskite Solar Cells

“…As for the working mechanism of PSCs, photons are absorbed on the perovskite absorption layer under sunlight irradiation to create electron-hole pair, which can be effectively separated at room temperature owing to the low exciton binding energy of halide perovskites and then transferred through ETL and HTL to the electrodes, respectively [ 32 , 33 , 34 ]. However, unavoidable recombination and accumulation of charge carriers are often experienced in PSCs under actual working conditions, leading to inferior PCEs and stability [ 35 , 36 ]. Numerous efforts have been devoted to boosting the PCEs and durability of PSCs during the past 5 years, and several effective strategies have been proposed, including material design for ETL, perovskite layer and HTL, additive engineering, interface control, solvent engineering and cell configuration design [ 26 , 29 , 30 , 36 , 37 , 38 , 39 ].…”

Impact of Alkyl-Based Side Chains in Conjugated Materials for Bulk Heterojunction Organic Photovoltaic Cells—A Review

“…Electronic devices are an integral part of everyday life and, among them, solar cells take a growing role. After years of exploration, effective materials for photovoltaics have been developed leading to various technology devices, such as perovskite and quantum dots with the current record efficiency at over 25% [1][2][3][4][5]. Additionally, organic photovoltaics (OPVs) have rapidly become attractive due to their solution-processability, low cost, light weight, flexibility, semi-transparency, and optical tunability advantages.…”

Preparation of freestanding and ultrastable CsPbX3 perovskite quantum dots/SEBS composite films for curved and flexible surfaces

“…[1][2][3][4] These features make them excellent candidates for light-emitting diodes (LEDs), solar cells, lasers, and photodetectors. [5][6][7][8][9][10][11] CsPbX 3 PQDs/polymer composite films are widely used as color-conversion layers assembled on lightemitting devices. [12][13][14] Moreover, curved and flexible electronic devices have more requirements for CsPbX 3 PQDs/polymer films, e.g.…”