Double perovskite Cs₂AgInCl₆:Cr³⁺: broadband and near-infrared luminescent materials

Abstract

A Cr3+-doped halide double perovskite Cs2AgInCl6:Cr3+ is first reported which exhibits a broad near-infrared emission ranging from 850 to 1350 nm centered at 1010 nm with a FWHM of 180 nm.

The Cs2AgRhCl6 Halide Double Perovskite: A Dynamically Stable Lead-Free Transition-Metal Driven Semiconducting Material for Optoelectronics

“…We note that the newly-proposed SCAN-rVV10 functional is one of the strongly constrained and appropriately normed metageneralized gradient approximation (meta-GGA) functionals that is considered to model well metallic, insulating and semiconducting materials (Sun et al, 2015;Sun J. et al, 2016;Buda et al, 2017). The rVV10 part of the functional accounts for the non-local correlation part required to appropriately describe van der Waals (vdW) interaction (Peng et al, 2016;Chakraborty et al, 2018;Zhang et al, 2018;Anh et al, 2019). Bokdam et al have demonstrated that the SCAN functional accounts for short range dispersion effects-which conventional hybrid functionals do not account for-and is the most suitable functional to study the atomic structure of hybrid perovskite materials (Bokdam et al, 2017).…”

“…Dynamically and Mechanically Stable Halide Double Perovskites are an important class of light harvesting materials for application in solar energy technology and optoelectronics (Greul et al, 2017;Matthews et al, 2017;Xiao et al, 2017;Zhao X.-G. et al, 2017;Chen et al, 2018;Lei et al, 2018;Luo et al, 2018;Tan et al, 2018;Xu et al, 2018;Chu et al, 2019;Zhao et al, 2019;Zhou Y. et al, 2019). They are characterized by the chemical formula A 2 BB ′ X 6 , where A is generally a monocationic organic or alkali metal species such as MA + (methyl ammonium), Cs + , Rb + ; B is an alkali metal ion or a transition metal atom in its +1 oxidation state (for example, Cu + , Ag + , Na + ); B ′ is a transition or main group metal ion in the +3 oxidation state (In 3+ , Bi 3+ , Sb 3+ , Cr 3+ ); and the X sites are occupied by halide ions.…”

“…Bandgap tuning by alloying of Cs 2 AgBiCl 6 nanocrystals resulted in a series of Cs 2 Na x Ag 1−x BiCl 6 (x = 0, 0.25, 0.5, 0.75, and 1) double perovskite nanocrystals that showed an increase in optical bandgap from 3.39 eV (x = 0) to 3.82 eV (x = 1) and a 30-fold increment in weak photoluminescence (Lamba et al, 2019). Other materials generated by replacing the B ′ -site species in A 2 BB ′ X 6 with transition metals such as Mn 3+ (Locardi et al, 2018;Nandha and Nag, 2018;, Cr 3+ (Zhao et al, 2019), etc., via partial or heavy doping play a significant role in the discovery of innovative halide double perovskite materials for optoelectronics (Jain et al, 2017;Bartel et al, 2019;Cai et al, 2019;Li and Yang, 2019).…”

Broadband deep‐red‐to‐near‐infrared emission from Mn2+ in strong crystal‐field of nitride MgAlSiN3

“…For practical applications, luminescence quantum efficiency is a critical parameter. Calculation detail for Luminescence quantum efficiency is shown in supporting information, and MASN:0.07Mn 2+ is provided with 70.1% internal quantum efficiency (IQE) excited at 310 nm as shown in Figure , which is comparable to that of some Cr 3+ doping matrixes 14‐17 . The absorption efficiency (Abs) is relatively low, and is determined to be 36.6%.…”

“…Calculation detail for Luminescence quantum efficiency is shown in supporting information, and MASN:0.07Mn 2+ is provided with 70.1% internal quantum efficiency (IQE) excited at 310 nm as shown in Figure S4, which is comparable to that of some Cr 3+ doping matrixes. [14][15][16][17] The absorption efficiency (Abs) is relatively low, and is determined to be 36.6%. Upon 470 nm excitation, IQE and Abs are 47.1% and 19.8% respectively, much lower than those under 310 nm excitation.…”