Bandgap-tuned barium bismuth niobate double perovskite for self-powered photodetectors with a full-spectrum response

Abstract

Due to fascinating structural and compositional flexibility, double perovskite oxides A2BB′O6 with an alternating network of BO6 and B′O6 octahedra exhibit great potential in optoelectronic devices. In this work, the...

Lead-Free Halide Double Perovskite for High-Performance Photodetectors: Progress and Perspective

“…For example, the lead-free stable oxide double perovskite A 2 M(III)M(V)O 6 (A = Ca, Sr, Ba; M(V) = V 5+ , Nb 5+ , or Ta 5+ ), which is transformed from prototype perovskite oxide CaTiO 3 , has been used as an absorbing layer material for photodetectors. Among them, a self-powered ITO/BBNO/Ag photodetector based on Ba 2 Bi 1.5 Nb 0.5 O 6 (Eg = 1.37 eV) has shown an optical response in the range of 365–760 nm and exhibited a photocurrent of 59.2 mA cm −2 and a response of 78.8 mA W −1 [ 94 ]. Another structurally similar calcium niobate Ca 2 Nb 2.5 Ta 0.5 O 10 nanosheet is also used as the photoactive layer of the detector, and the device shows a switching ratio of 5.6 × 10 4 and a responsiveness of up to 469.5 A W −1 at 1 V bias and 295 nm illumination [ 95 ].…”

Lead-Free Halide Double Perovskite for High-Performance Photodetectors: Progress and Perspective

“…For example, the lead-free stable oxide double perovskite A 2 M(III)M(V)O 6 (A = Ca, Sr, Ba; M(V) = V 5+ , Nb 5+ , or Ta 5+ ), which is transformed from prototype perovskite oxide CaTiO 3 , has been used as an absorbing layer material for photodetectors. Among them, a selfpowered ITO/BBNO/Ag photodetector based on Ba 2 Bi 1.5 Nb 0.5 O 6 (Eg = 1.37 eV) has shown an optical response in the range of 365-760 nm and exhibited a photocurrent of 59.2 mA cm −2 and a response of 78.8 mA W −1 [94]. Another structurally similar calcium niobate Ca 2 Nb 2.5 Ta 0.5 O 10 nanosheet is also used as the photoactive layer of the detector, and the device shows a switching ratio of 5.6 × 10 4 and a responsiveness of up to 469.5 A W −1 at 1 V bias and 295 nm illumination [95].…”

First-principles investigation of the structural stability, electronic, and thermodynamic properties of Ba2NaHaO6 (Ha = Cl, Br, I) periodate double perovskites

“…[20][21][22][23] They offer tunable band gaps with appropriate combinations of A and B cations for optoelectronic applications. 24,25 They have shown higher carrier mobility and high defect tolerance. 26,27 Moreover, two different cations increase their structural stability and resistance to environmental deterioration.…”