• Journal of Semiconductors
  • Vol. 42, Issue 12, 120202 (2021)
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 show less
    (Color online) Tuning Eg of double perovskites.
    Fig. 1. (Color online) Tuning Eg of double perovskites.
    Structure formulaRepresentativeAdvantageDisadvantage
    AB(II)X3FASnI3High absorption, high mobilityUnstable
    A2B(IV)X6Cs2SnI6Stable, suitable EgDefect
    A3B(III)2X9Cs3Bi2I9StableWide Eg, defect
    A2B(I)B(III)X6Cs2AgBiBr6StableWide Eg
    AaB(III)bXa+3bAg3BiI6High absorptionPhase separation, defect
    Table 1. Properties of lead-free perovskites.
    PrecursorMethodProductEg (eV) FeatureRef.
    A: Chemical composition. B: Physical structure.
    Cs2AgBiBr6ACs2(Ag1–aBi1–b)TlxBr6(x = a+b) 1.40–1.95Toxicity of Tl[9]
    Cs2AgBiBr6ACs2(Ag1–(2a+b)Sna(II))(Bi1–bSnb(IV))Br61.48 (i) and 1.71 (d)Unstable Sn2+[10]
    Cs2AgBiBr6ACs2Ag(Bi1–xMx)Br6(M:In,Sb) 1.86 (Sb0.375) –2.28 (In0.75) Sb3+ decreases while In3+ increases Eg[11]
    Cs2AgBiBr6ACs2(Ag:Cu+/Cu2+)BiBr6Tailing to 860 nmDefect absorption[14]
    Cs2AgBiBr6ACs2Ag(BiFe)Br6Tailing to 800 nmDefect absorption[15]
    Cs2AgInCl6ACs2AgIn1–xFexCl61.6–2.8For single crystal[16]
    Cs2AgBiBr6B (temperature)Cs2AgBiBr6Reversible[18]
    Cs2AgBiBr6B (temperature)Cs2AgBiBr61.72–1.98For single crystal[19]
    Cs2AgBiBr6B (pressure)Cs2AgBiBr61.70 @15 GPaPartially retainable[20]
    Table 2. Tuning Eg of double perovskites.