A5035768474- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Chalcogenide Semiconductor Thin Films
- Phase-change materials and chalcogenides
- Advanced Thermoelectric Materials and Devices
- Crystal Structures and Properties
- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
National Synchrotron Radiation Research Center
2024
National Yang Ming Chiao Tung University
2016-2023
Tin-based perovskite solar cells (TPSCs) are a promising alternative to the traditional lead-based PSCs for lead-free photovoltaic applications. To further promote performance and stability, tandem type of TPSC is an attractive direction pursue. serve as low-bandgap with bandgap (Eg) around 1.4 eV, searching high-bandgap Eg in range 1.8–2.0 eV important task build TPSC. Herein, we report first quadruple-cation wide-bandgap structure FA0.55MA0.25Cs0.1PMA0.1SnBr2I (FA, formamidinium; MA,...
Tin perovskite solar cells (TPSCs) were developed by adding the co-cations acetamidinium (AC) and rubidium (Rb) in varied proportions based on FASnI3 structure (E1). We found that 10% AC 3% Rb can optimize device (E1AC10Rb3) to attain an efficiency of power conversion 14.5% with great shelf- light-soaking stability. The films at characterized using XPS, SEM, AFM, GIWAXS, XRD, TOPAS, TOF-SIMS, UV–vis, PL, TCSPC, femtosecond TAS techniques show excellent optoelectronic properties E1AC10Rb3...
Ternary chalcogenides, GeSb2Se3 and Ge3Sb4Se7, were synthesized characterized. These chalcogenides are the first ternary selenides in a Ge-Sb-Se system that feature layer structure related to black phosphorus SnSe-type structures. Both compounds contain ∞1[Sb2Se2]2- unit with Sb+ cations zigzag Sb-Sb chain structure, Sb3+ distorted NaCl100-type of ∞1[Gen-2Sb2Sen]2+ (n = 4, 5). materials exhibit n-type semiconducting properties thermal conductivity significantly lower than GeSe Sb2Se3, which...
Abstract New multinary selenides with general formula A 10 B 18 Se 37 (A=Sn/Pb; B=In/Sb or Sb/Bi) were synthesized a new structure type in the monoclinic space group C2/m (No. 12), including Sn In 7 Sb 11 , Bi 8.21 Pb 1.79 and 3.84 6.16 5.68 12.32 . The crystal is related to Proudite‐Felbertalite homologous series made up of layered units derived from octahedrally coordinated MSe 6 stepped layers 16 octahedra overlapped by 8 units, 1D ribbons metal centers 3 5 2− anions. Structural...
Newquaternary selenide Sn 4 (In/Sb) 14 Se 25 was synthesized by a solid state chemistry reaction with stoichiometric mixture of elements (Sn:In:Sb:Se = 5:4:9:25).The structure is constructed two building units called NaCl 100 -type () and 111 (), respectively.Due to similar atomic numbers indium, tin antimony atoms, the valence coordination environments sites were utilized assign metal positions.Five-coordinated (square pyramid) in considered as mixed occupied 2+ /Sb 3+ , while...
Abstract Multinary selenides A 4 B 10 Se 19 (A=Sn/Pb; B=Sb/Bi), including Sn Bi , Pb Sb 6.71 3.29 and 3.43 6.57 were prepared by solid‐state reactions. These compounds adopt the Felbertalite structure type that crystallizes in monoclinic space group C2/m (No. 12). Single‐crystal powder X‐ray diffraction measurements studied crystal site preference of metal sites. They exhibit stacking stepped layers (NaCl 111 ‐type) ribbon‐shape 100 units are connected via shared 2− ions. Electronic...
Abstract Two new quaternary polyselenides, Ba 4 TMSbSe 12 (TM = Nb, Ta), are synthesized using a solid state reaction. They crystallize in structural type with P‐1 triclinic space group, characterized according to single‐crystal X‐ray diffraction. The structure is alternately stacked isolated NbSe 9 5− and SbSe 3 3− , which separated by 2+ . contains the unit bipentagonal pyramidal shape coordinated Se 2− 2 monodenteate bidentate modes. vibrational property of diselenide was studied Raman...