Recent Progress in Perovskite‐Based Reversible Photon–Electricity Conversion Devices

Abstract

Solution‐processed metal halide perovskites have the advantages of a tunable bandgap, excellent charge transport properties, and suitable exciton binding energy. They therefore emerge as promising semiconductors for efficient perovskite solar cells (PSCs) and bright perovskite light‐emitting diodes (PLEDs). In addition, these devices possess a similar planar–heterojunction architecture, thus novel dual‐functional perovskite light‐emitting solar cells (PLESCs) that can realize electrical‐to‐optical and optical‐to‐electrical conversion on one device are developed. To date, high‐performance PLESCs with 17.2% electroluminescence external quantum efficiency and 25.2% power conversion efficiency are achieved using a holistic optimization approach. However, a comprehensive review focusing on dual‐functional PLESCs with discussion on their development and limitations, remains lacking. Herein, the rapid progress in PLESCs, including 0D quantum dot, 2D Ruddlesden–Popper, and 3D bulk perovskite devices, is reviewed. First, the fundamental understanding of the device structure and working principle of PLESCs is overviewed. Second, the state‐of‐the‐art developments for simultaneously achieving high‐efficiency PSCs and PLEDs, focusing on defect passivation, interface optimization, energy level alignment, and dimensional control, are comprehensively summarized. Finally, the authors offer some perspectives for future trends in the development of promising PLESCs, which can provide guidelines for this emerging field.

A shape memory scaffold for body temperature self‐repairing wearable perovskite solar cells with efficiency exceeding 21%

“…So far, many breakthroughs of flexible PSCs have been reported and achieved with an efficiency of over 21% 10,11 . In particular, due to the ionic nature and the solution‐based preparation characteristics of perovskite materials, many defects are generated on the surface and grain boundaries of perovskite films 12,13 . Compared with conventional PSCs on rigid substrates, such defects of perovskite films on flexible substrates are more obvious, due to the high surface roughness of the flexible substrate 14–16 .…”

Efficient MA-free perovskite solar cells with balanced carrier transport achieved using 4-trifluorophenylammonium iodide

“…For example, MTDAA with multi-activesite chemically interact with uncoordinated Pb 2+ at the surface or grain boundary of Rb 0.02 (FA 0.95 Cs 0.05 ) 0.98 -PbI 2.91 Br 0.03 Cl 0.06 perovskite lms to signicantly increase the average charge lifetime from 468.34 to 629.62 ns and upli the open-circuit voltage (V OC ) from 1.125 to 1.160 V. 22 Recently, the strategy to construct a two-dimensional/three-dimensional (2D/ 3D) heterojunction has become favourable to simultaneously passivate defects and enhance the moisture stability because of the hydrophobic characteristics of the large organic cations in the 2D layer. [23][24][25][26][27][28] Leong et al employed 5-aminovaleric acid iodide (5-AVAI) to in situ form the 2D (5-AVA) 2 PbI 4 layer in the top 3D MAPbI 3 perovskite, resulting in nearly two-fold enhancement of stability under ambient conditions compared with that of the pure 3D PSCs. 26 Notably, the research on the 2D/ 3D junction in the MA-free devices has been rarely investigated (Table S1, ESI †).…”

Exploring novel ligands with strong electron delocalization for high-performance blue CsPbBr3 perovskite nanoplatelets

“…All-inorganic colloidal CsPbBr 3 perovskite nanoplatelets (NPLs) have been proved to be an attractive candidate for constructing blue-emitting perovskites in recent years. [1][2][3][4][5][6][7][8] Benefiting from the quantum confinement effect, the emission of NPLs can be precisely tuned from green to deep blue without introducing other elements. 9,10 Compared with perovskite quantum dots, two-dimensional (2D) NPLs only shrink their thickness along one direction and can be accurately tailored by adjusting the ratio of Cs/Pb or surface ligands.…”