Research

A new route for caesium lead halide perovskite deposition

¹ Department of Physics and Astronomy, University of Florence, via G. Sansone 1, I-50019, Sesto Fiorentino, Italy
² European Laboratory for Non-Linear Spectroscopy - LENS, via Nello Carrara 1, I-50019, Sesto Fiorentino, Italy
³ Industrial Engineering Department, University of Florence, via S. Marta 3, I-50139, Florence, Italy
⁴ Interuniversity National Consortium for Material Science and Technology - INSTM, via Giusti 9, I-50121, Florence, Italy
⁵ Department of Information Engineering, University of Brescia, via Branze 38, I-25123, Brescia, Italy
⁶ Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, I-38123, Trento, Italy
⁷ INFN-Firenze, via G. Sansone 1, I-50019, Sesto Fiorentino, Italy

^a naomi.falsini@unifi.it

Received: 15 December 2020
Accepted: 19 May 2021

Abstract

Inorganic metal halide perovskites are relevant semiconductors for optoelectronic devices. The successful deposition of thin films of CsPbBr₃ and CsPbCl₃ has recently been obtained by Radio-Frequency magnetron sputtering. In this work we compare the morphological, structural and optical characteristics of the two materials obtained with this deposition technique. A detailed photoluminescence (PL) spectroscopy study of the as-grown samples was conducted at the macro and micro scale in a wide temperature range (10-300 K) to fully characterize the PL on sample areas of square centimeters, to assess the origin of the inhomogeneous broadening and to quantify the PL quantum yield quenching. Our results prove that this technique allows for the realization of high quality nanometric films with controlled thickness of relevance for optoelectronic applications.