Tuning the bandgap of double perovskites

Yu Zou; Wenjin Yu; Lixiu Zhang; Cuncun Wu; Lixin Xiao; Liming Ding

doi:10.1088/1674-4926/42/12/120202

Journals >Journal of Semiconductors >Volume 42 >Issue 12 >Page 120202 > Article

Journal of Semiconductors
Vol. 42, Issue 12, 120202 (2021)

Tuning the bandgap of double perovskites

Yu Zou¹, Wenjin Yu¹, Lixiu Zhang³, Cuncun Wu²..., Lixin Xiao¹ and Liming Ding³|Show fewer author(s)

Author Affiliations

¹State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China

²School of Materials Science and Engineering, State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China

³Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

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DOI: 10.1088/1674-4926/42/12/120202 Cite this Article

Yu Zou, Wenjin Yu, Lixiu Zhang, Cuncun Wu, Lixin Xiao, Liming Ding. Tuning the bandgap of double perovskites[J]. Journal of Semiconductors, 2021, 42(12): 120202 Copy Citation Text

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Fig. 1. (Color online) Tuning E_g of double perovskites.

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Structure formula	Representative	Advantage	Disadvantage
AB(II)X₃	FASnI₃	High absorption, high mobility	Unstable
A₂B(IV)X₆	Cs₂SnI₆	Stable, suitable E_g	Defect
A₃B(III)₂X₉	Cs₃Bi₂I₉	Stable	Wide E_g, defect
A₂B(I)B(III)X₆	Cs₂AgBiBr₆	Stable	Wide E_g
A_aB(III)_bX_a+3b	Ag₃BiI₆	High absorption	Phase separation, defect

Table 1. Properties of lead-free perovskites.

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Precursor	Method	Product	E_g (eV)	Feature	Ref.
A: Chemical composition. B: Physical structure.
Cs₂AgBiBr₆	A	Cs₂(Ag_1–aBi_1–b)Tl_xBr₆(x = a+b)	1.40–1.95	Toxicity of Tl	[9]
Cs₂AgBiBr₆	A	Cs₂(Ag_1–(2a+b)Sn_a(II))(Bi_1–bSn_b(IV))Br₆	1.48 (i) and 1.71 (d)	Unstable Sn²⁺	[10]
Cs₂AgBiBr₆	A	Cs₂Ag(Bi_1–xM_x)Br₆(M:In,Sb)	1.86 (Sb_0.375) –2.28 (In_0.75)	Sb³⁺ decreases while In³⁺ increases E_g	[11]
Cs₂AgBiBr₆	A	Cs₂(Ag:Cu⁺/Cu²⁺)BiBr₆	Tailing to 860 nm	Defect absorption	[14]
Cs₂AgBiBr₆	A	Cs₂Ag(BiFe)Br₆	Tailing to 800 nm	Defect absorption	[15]
Cs₂AgInCl₆	A	Cs₂AgIn_1–xFe_xCl₆	1.6–2.8	For single crystal	[16]
Cs₂AgBiBr₆	B (temperature)	Cs₂AgBiBr₆	Reversible		[18]
Cs₂AgBiBr₆	B (temperature)	Cs₂AgBiBr₆	1.72–1.98	For single crystal	[19]
Cs₂AgBiBr₆	B (pressure)	Cs₂AgBiBr₆	1.70 @15 GPa	Partially retainable	[20]

Table 2. Tuning E_g of double perovskites.

Yu Zou, Wenjin Yu, Lixiu Zhang, Cuncun Wu, Lixin Xiao, Liming Ding. Tuning the bandgap of double perovskites[J]. Journal of Semiconductors, 2021, 42(12): 120202

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