Halide perovskites: from materials to optoelectronic devices

Abstract

Halide perovskites have been extensively studied in last decade partially due to the unprecedentedly rapid increase of power conversion efficiency of perovskite based solar cells. In addition to the solar cells, perovskite based optoelectronic devices such as photodetectors and light emitting devices have also been demonstrated with impressive performance, benefited from the large absorption coefficient, tunable band gap, defect tolerance and long carrier diffusion length. Although significant progress has been made in these fields, a few challenges including long-term stability and toxicity of lead greatly limit their commercialization. Great effort has been put into those fields to address the long-last issues from aspects of fundamental understanding of their photophysics, material engineering and performance optimization. This special issue on "Halide perovskites: from materials to optoelectronic devices" including one comment, four reviews, and five original research articles covers all topics mentioned. In this special issue, Xiong et al. [1] from Nanyang Technological University (Singapore) give an in-depth comment on the current development and future research direction of Bose-Einstein condensation of exciton polariton based on perovskites. Koleilat et al. [2] give a thorough summary on how the dimensionality engineering including morphological engineering and molecular engineering could affect their band gap, binding energy and carrier mobility and subsequently the performance of photodetectors and solar cells. Li et al. [3] review the research process of self-trapped excitons in two-dimensional perovskite including the origins of self-trapped excitons, how to detect and control the self-trapped excitons and how the presence of self-trapped excitons influences the performance of perovskite based optoelectronic devices. Tang et al. [4] collect the performance matrix including external quantum efficiency, luminance, and stability status of perovskite based light emitting diodes, presenting a brief yet comprehensive overview of this field to readers. Chen et al. [5] summarize the possible top cells for next-generation Si-based tandem solar cells and further propose the promising candidate top cells. Mei et al. [6] explore how the precursor concentrations affects the performance of printable hole-conductor-free mesoscopic perovskite solar cells via a simple one-step drop-coating method while You et al. [7] investigate the performance and thermal stability of inorganic perovskite solar cells by using dopant-free polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT), as the holetransport layer. Zhong et al. [8] fabricate a wide-bandgap formamidinium lead bromide film using a doctor-bladecoating method and study the effect of the species of surfactants on the performance of the solar cells based on the as-fabricated film. Wei et al. [9] demonstrate how to fabricate efficient perovskite based light emitting diodes via composite engineering. Mu et al. [10] propose a corona modulation device structure to achieve random...

Advanced Optoelectronic Modeling and Optimization of HTL-Free FASnI3/C60 Perovskite Solar Cell Architecture for Superior Performance

“…In this context, tin-based perovskites, particularly formamidinium tin iodide (FASnI 3 ), are noteworthy. They feature intrinsically favorable optical band gaps of about 1.41 eV and a high absorption coefficient, which results in a short carrier diffusion length, long carrier lifetime, low exciton binding energy, and stable electronic band structures [ 27 , 28 ]. These properties position FASnI 3 as a prime candidate for further advancement in photovoltaic (PV) technology, utilizing its unique characteristics for improved solar cell performance.…”

Quantum Dots for Photovoltaics: A Tale of Two Materials

“…[43,62] To date, PVKs have achieved significant success in thin-film solar cells with a record PCE of ≈25%. [63][64][65] Their excellent photovoltaic properties, including large light absorption coefficient, tunable energy levels, long diffusion length for charge carrier, and low exciton binding energy, have attracted immense interest in QDs synthesis and technical applications. [66][67][68][69] PVKs have cubic crystal structures with a general formula ABX 3 (Figure 1d,e), where A represents a monovalent cation, B is a bivalent metal cation, and X stands for halides.…”

Two-Dimensional Hybrid Perovskite-Based van der Waals Heterostructures

“…Three dimensional organic–inorganic hybrid perovskites (OIHP) have become the center of attention in optoelectronic fields recently because of their prominent performance in perovskite solar cells. − Initiated by the first photovoltaic application in 2009, hybrid perovskites have gained increasing attention. Their unique features, such as tunable bandgap, high optical absorption coefficient, long carrier diffusion length, and wet chemistry processability, − render them promising candidates for optoelectronic devices, including photodetectors, − transistors, − and light-emitting diodes (LEDs). , However, the poor long-term stability of OIHP devices that is caused by their hydrophilic nature and sensitivity to environmental temperature and moisture impedes the practical applications and thus prompts researchers to look for alternatives with higher stability, which makes Ruddlesden–Popper two-dimensional (2D) inorganic–organic hybrid perovskites stand out. − …”