Ag/In lead-free double perovskites

被引：21

作者：

Liu, Fang ^{[1
]}

Marongiu, Daniela ^{[1
]}

Pau, Riccardo ^{[1
]}

Sarritzu, Valerio ^{[1
]}

Wang, Qingqian ^{[1
]}

Lai, Stefano ^{[1
]}

Lehmann, Alessandra G. ^{[1
]}

Quochi, Francesco ^{[1
]}

Saba, Michele ^{[1
]}

Mura, Andrea ^{[1
]}

Bongiovanni, Giovanni ^{[1
]}

Mattoni, Alessandro ^{[2
]}

Caddeo, Claudia ^{[2
]}

Bosin, Andrea ^{[1
]}

Filippetti, Alessio ^{[1
,2
]}

机构：

[1] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Italy

[2] Cittadella Univ, Ist Officina Mat CNR IOM Cagliari, Monserrato, Italy

来源：

ECOMAT | 2020年 / 2卷 / 01期

关键词：

hybrid perovskites; lead-free; optical properties; HALIDE DOUBLE PEROVSKITES; SOLAR-CELLS; IODIDE PEROVSKITE; RADIATIVE RECOMBINATION; THIN-FILMS; BAND-GAPS; EFFICIENCY; STABILITY; TRANSITIONS; PERFORMANCE;

D O I：

10.1002/eom2.12017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead-free Cs2AgInCl6 and Cs2AgInBr6 double perovskites are studied by a combination of advanced ab-initio calculations and photoluminescence experiments. We show that they are insulators with direct band gaps of 2.53 and 1.17 eV, respectively; most importantly, they are characterized by unusually low absorption rates in a similar to 1 eV wide energy region above the band gap, caused by rather peculiar electronic properties. Consequently, this low absorption conveys very long recombination lifetimes, up to milliseconds at low temperature. Our theoretical analysis suggests that such materials can achieve a good compromise between photoconversion efficiency (above 10%) and visible transmittance (above 30%), which makes them potentially suited for lead-free semitransparent solar cell applications.

引用

页数：14

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