Purcell effect in an organic-inorganic halide perovskite semiconductor microcavity system

Abstract

Organic-inorganic halide perovskite semiconductors with the attractive physics properties, including strong photoluminescence (PL), huge oscillator strengths, and low nonradiative recombination losses, are ideal candidates for studying the light-matter interaction in nanostructures. Here, we demonstrate the coupling of the exciton state and the cavity mode in the lead halide perovskite microcavity system at room temperature. The Purcell effect in the coupling system is clearly observed by using angle-resolved photoluminescence spectra. Kinetic analysis based on time-resolved PL reveals that the spontaneous emission rate of the halide perovskite semiconductor is significantly enhanced at resonance of the exciton energy and the cavity mode. Our results provide the way for developing electrically driven organic polariton lasers, optical devices, and on-chip coherent quantum light sources.

Simplified Perovskite Solar Cell with 4.1% Efficiency Employing Inorganic CsPbBr3 as Light Absorber

“…Intriguingly, this dramatic PL quenching can be caused by the significantly enhanced charge extraction stemming from GQDs and PQDs, the corresponding charge transfer paths are provided in Figure a. In addition, time‐resolved PL decay curves of glass/CsPbBr 3 , glass/GQDs/CsPbBr 3 , and glass/GQDs/CsPbBr 3 /PQDs films are further measured to determine the PL decay lifetimes (Figure b), demonstrating ultrafast lifetimes (about 1 ns) and much slower decay processes (>3 ns) after fitted by the double‐exponential decay function I = A e −( t − t 0)/ τ 1 + B e −( t − t 0)/ τ 2 , where τ 1 is the faster component of trap‐mediated nonradiative recombination and τ 2 is the slower component correlated to radiative recombination . It is remarkable that glass/GQDs/CsPbBr 3 and glass/GQDs/CsPbBr 3 /PQDs films have smaller τ 2 values of 3.63 and 2.8 ns in comparison with 4.86 ns for glass/CsPbBr 3 film, respectively.…”

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

“…Furthermore, if the surface charge carrier trapping plays a role here, it also should decrease with the increasing of cavity size. In this case, the observed linear dependence of lasing threshold on microplate size is explained by the cavity‐QED theory which was developed by Yokoyama et al Accordingly to the cavity‐QED theory, the light emission enhancement at the cavity resonance increases with the cavity mode separation. Within the gain spectrum range, each mode can suck up more energy with fewer modes existed in the cavity under fixed energy injection.…”

Promoting the Hole Extraction with Co3O4 Nanomaterials for Efficient Carbon‐Based CsPbI2Br Perovskite Solar Cells

“…In order to further investigate the interfacial carrier dynamics, the TRPL decay curves for the three films were measured, as shown in Figure b. The PL decay lifetime can be obtained by the double‐exponential decay function (2): where τ 1 corresponds to the faster component of trap‐mediated nonradioactive recombination and τ 2 is the slower component related to the radiative recombination . It is noted that CsPbI 2 Br/C and CsPbI 2 Br/Co 3 O 4 /C films have smaller τ 2 values of 5.179 and 3.154 ns compared to the value of 6.835 ns for CsPbI 2 Br film, respectively.…”