Photovoltaic solar cells operate under steady-state conditions that are established during the charge carrier excitation and recombination. However, to date no model of the steady-state recombination scenario in halide perovskites has been proposed. In this Letter we present such a model that is based on a single type of recombination center, which is deduced from our measurements of the illumination intensity dependence of the photoconductivity and the ambipolar diffusion length in those materials. The relation between the present results and those from time-resolved measurements, such as photoluminescence that are commonly reported in the literature, is discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpclett.6b02287 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Large Scale Lead-Free Perovskite Polycrystalline Wafer Achieved by Hot-Pressed Strategy for High-Performance X-Ray Detection.
Adv Mater
December 2024
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China.
Article Synopsis
- * Lead-free perovskite wafers currently suffer from low sensitivity issues, usually below 1000 µC Gy cm, limiting their practical use in X-ray applications.
- * The successful development of AGBiI polycrystalline wafers using a hot-pressing method has resulted in significantly improved sensitivity (2675 µC Gy cm) and excellent imaging capabilities, making them suitable for advanced X-ray detection systems.
Growth and Performance of Perovskite Semiconductor CsPbX (X = Cl, Br, I, or Mixed Halide) for Detection and Imaging Applications.
Materials (Basel)
November 2024
Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA.
The material family halide perovskites has been critical in recent room-temperature radiation detection semiconductor research. Cesium lead bromide (CsPbBr) is a halide perovskite that exhibits characteristics of a semiconductor that would be suitable for applications in various fields. In this paper, we report on the correlations between material purification and crystal material properties.
View Article and Find Full Text PDFIntercalation Electrode and Grain Reconstruction Induce Significant Sensitivity Enhancement for Perovskite X-ray Detectors.
ACS Appl Mater Interfaces
October 2024
College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Organic-inorganic hybrid perovskites have been recognized as potential candidates in direct X-ray detectors and have triggered tremendous interest in the past years. The blade coating method meets the requirements of large area and low cost for perovskite X-ray detectors, while the low compactness resulting from solvent evaporation limits the charge collection efficiency (CCE) and device sensitivity. Most of the reports are focused on the melioration of perovskite films to increase device sensitivity; there are still problems of low CCE.
View Article and Find Full Text PDFHigh Sensitivity X-Ray Detectors with Low Degradation Based on Deuterated Halide Perovskite Single Crystals.
Adv Mater
November 2024
State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, China.
Methylammonium lead single crystal (MAPbI SC) possesses superior optoelectronic properties and low manufacturing cost, making it an ideal candidate for X-ray detection. However, the ionic migration of the perovskites usually leads to instability, dark current drift, and hysteresis of the detector, limiting their applications in well-established technologies. Here, a series of X-ray detectors of MAPbI SCs are reported with different degrees of deuteration (DMAPbI, x = 0, 0.
View Article and Find Full Text PDFRational Design of A-Site Cation for High Performance Lead-Free Perovskite X-Ray Detectors.
Small
November 2024
Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, China.
Design of hypotoxic lead-free perovskites, e.g. Bismuth(Bi)-based perovskites, is much beneficial for commercialization of perovskite X-ray detectors due to their strong radiation absorption.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!