We observe radiative recombination from an electron-hole liquid (EHL) in a thin film of FAPbBr3, 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.
Ammirati, G., Catone, D., O'Keeffe, P., Toschi, F., Turchini, S., Matteocci, F., et al. (2023). Electron-hole liquid formation in formamidinium lead bromide perovskite FAPbBr3. PHYSICAL REVIEW. B, 108(19) [10.1103/PhysRevB.108.195201].
Electron-hole liquid formation in formamidinium lead bromide perovskite FAPbBr3
Ammirati G.;Toschi F.;Matteocci F.;Barichello J.;Di Carlo A.;Martelli F.
2023-01-01
Abstract
We observe radiative recombination from an electron-hole liquid (EHL) in a thin film of FAPbBr3, 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
