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Type: 
Journal
Description: 
We observe radiative recombination from an electron-hole liquid (EHL) in a thin film of F A Pb Br 3, a metal halide perovskite used in transparent photovoltaics and light emitters. Photoluminescence (PL) at low excitation intensity and low temperatures only shows the free-exciton (FE) signal. As the excitation intensity increases, two additional signals in PL emerge: the electron-hole plasma (EHP) and the EHL recombination bands. For both the FE-EHP and the EHP-EHL phase transitions, a critical carrier density is established and a phase diagram is presented.
Publisher: 
American Physical Society
Publication date: 
6 Nov 2023
Authors: 

Giuseppe Ammirati, Daniele Catone, Patrick O’Keeffe, Francesco Toschi, Stefano Turchini, Fabio Matteocci, Jessica Barichello, Aldo Di Carlo, Faustino Martelli

Biblio References: 
Volume: 108 Issue: 19 Pages: 195201
Origin: 
Physical Review B