2017
DOI: 10.1039/c7nj01442b
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New insights into the electronic structures and optical properties in the orthorhombic perovskite MAPbI3: a mixture of Pb and Ge/Sn

Abstract: The photovoltaic performance of the organic–inorganic hybrid perovskite MAPbI3can be significantly improved by the substitution of Ge/Sn for Pb.

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Cited by 27 publications
(22 citation statements)
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“…A similar bandgap behavior for MASn 1− x Pb x I 3 perovskite was also observed by Ogomi et al Besides the Sn/Pb alloying, the Pb‐site can be doped by other cations such as Sr, Ca, and Cd, with the bandgap values following the trend Sr < Ca < Cd < Sn ≈ Pb . Other B‐site mixing such as Ge/Sn‐doped MAPbI 3 perovskite was studied by theoretical calculations and the results show that the optical absorption coefficient can be significantly enhanced by the Ge/Sn doping except the bandgap tuning …”
Section: Fundamentals Of Optical Process In Metal Halide Perovskitessupporting
confidence: 72%
“…A similar bandgap behavior for MASn 1− x Pb x I 3 perovskite was also observed by Ogomi et al Besides the Sn/Pb alloying, the Pb‐site can be doped by other cations such as Sr, Ca, and Cd, with the bandgap values following the trend Sr < Ca < Cd < Sn ≈ Pb . Other B‐site mixing such as Ge/Sn‐doped MAPbI 3 perovskite was studied by theoretical calculations and the results show that the optical absorption coefficient can be significantly enhanced by the Ge/Sn doping except the bandgap tuning …”
Section: Fundamentals Of Optical Process In Metal Halide Perovskitessupporting
confidence: 72%
“…Considering the growth and annealing conditions in the experimental process, E f must be controlled by the chemical potential of the host atoms in the corresponding environment. Taking C 4 N 2 H 14 PbBr 4 as an example, the chemical potentials of the components in C 4 N 2 H 14 PbBr 4 should satisfy the following relation , wherein the chemical potential of the Pb atom should be limited by the following conditions, where E [(C 4 N 2 H 14 ) n Pb n Br 4 n ] represents the total energy of pure C 4 N 2 H 14 PbBr 4 consisting of n primitive cells and E [(C 4 N 2 H 14 ) n Pb n –1 Br 4n ] represents the energy with one Pb vacancy. The chemical potential of bulk Pb is usually set to zero.…”
Section: Resultsmentioning
confidence: 99%
“…The photoelectric performance of Sn and Pb hybrid perovskites has been extensively reported. The partial replacement of Pb 2+ with Sn 2+ could tune the band gap and extend the absorption spectra toward the infrared region . In addition, the Ge element, located in the same group as Sn/Pb in the periodic table of elements, is also considered as another suitable candidate for doping into the lead-based perovskites. , The Ge-doped CH 3 NH 3 Ge x Pb (1– x ) I 3 perovskites possess promising optical and transport properties comparable to the lead analogues . Thus, doping with other less toxic metal cations in lead halide perovskites can provide a valid route to fabricate lead-less photovoltaics without sacrificing their performance.…”
Section: Introductionmentioning
confidence: 99%
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“…[11,12] As ar epresentative hybrid organic-inorganic perovskite, methylammonium lead iodide [CH 3 NH 3 PbI 3 (MAPbI 3 )] has uniqueo ptical and electronic properties, such as limited charge recombination, [13,14] long carrier diffusion length, [15] and broadband light absorption. [16] In particular, experiments have demonstrated that long-range hot-carrier transportc an persist over tens of picoseconds and about 600 nm in MAPbI 3 ,w hich make it an excellent light absorber in solar cells, [17][18][19][20] with potential applicationsi np hotocatalysis. [21][22][23] However, water molecules can interact with its crystal lattice through hydrogen bonding, resulting in collapse of the MAPbI 3 crystal structure.…”
Section: Introductionmentioning
confidence: 99%