Journal ArticleDOI
Improving the Cu 2 ZnSn(S,Se) 4 -Based Photovoltaic Conversion Efficiency by Back-Contact Modification
Brajendra S. Sengar,Vivek Garg,Gaurav Siddharth,Amitesh Kumar,Sushil K. Pandey,Mayank Dubey,Victor V. Atuchin,Shailendra Kumar,Shaibal Mukherjee +8 more
TLDR
In this article, an ultrathin layer of ZnS is deposited over Mo-coated soda lime glass substrate before depositing CZTSSe using sputtering, and the crystal structure of the deposited CZTsSe thin films over Zns is recognized as (112)-oriented, polycrystalline in nature, and free from the presence of any secondary phases such as Cu2(S,Se) or ZnAbstract:
Back-contact modification using a 10-nm ZnS layer in CZTSSe-based solar cell can play a crucial role in improving photovoltaic conversion efficiency. An ultrathin layer of ZnS is deposited over Mo-coated soda lime glass substrate before depositing CZTSSe using sputtering. The crystal structure of deposited CZTSSe thin films over ZnS is recognized as (112)-oriented, polycrystalline in nature, and free from the presence of any secondary phases such as Cu2(S,Se) or Zn(S,Se). The bandgap of CZTSSe thin films deposited over ultrathin ZnS is observed to increase from 1.49 (deposited over Mo directly) to 1.58 eV at room temperature, as determined by spectroscopic ellipsometry. In addition, numerical simulation has been performed using SCAPS software. The impact of ZnS layer has been simulated by using the defects in the absorber and at the interface of ZnS/CZTSSe. The simulated results have been validated with experimentally fabricated CZTSSe device. Simulated device with ZnS intermediate layer is observed to give rise to a photovoltaic conversion efficiency of 15.2%.read more
Citations
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Journal ArticleDOI
Theoretical investigations of band alignments and SnSe BSF layer for low-cost, non-toxic, high-efficiency CZTSSe solar cell
TL;DR: In this paper, a numerical simulation approach is utilized using SCAPS-1D software to model, modify, optimize, and evaluate the CZTSSe solar cell structure, and a maximum power conversion efficiency of 17.55% is achieved with an optimized structure.
Journal ArticleDOI
Structural and photophysical measurements of Er3+ doped Gd4Al2O9 nanophosphors for NUV excitable solid-state lighting applications
TL;DR: In this article , a green emitting Gd4-xAl2O9:xEr3+ [x = 1 to 6 mol%] nanophosphors were synthesized via urea assisted solution combustion (SC) synthetic pathway and characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM) observations and spectrofluorophotometric measurements.
Journal ArticleDOI
First-principles investigations of structural, optoelectronic and thermoelectric properties of Cu-based chalcogenides compounds
TL;DR: In this paper, the structural, electronic, optical and thermoelectric properties of copper-based ternary chalcogenides ACuSe2 were investigated within the framework of the density functional theory.
Journal ArticleDOI
Quaternary Selenides EuLnCuSe3: Synthesis, Structures, Properties and In Silico Studies
Maxim V. Grigoriev,Leonid A. Solovyov,A. V. Ruseikina,Aleksandr S. Aleksandrovsky,V. Chernyshev,D. A. Velikanov,Alexander A. Garmonov,Maxim S. Molokeev,Aleksandr S. Oreshonkov,N.P. Shestakov,Alexey V. Matigorov,Svitlana Volkova,Evgeniy A. Ostapchuk,A. V. Kertman,Thomas Schleid,Damir A. Safin +15 more
TL;DR: In this paper , the authors report on the synthesis, in-depth crystal structure studies as well as optical and magnetic properties of newly synthesized heterometallic quaternary selenides of the Eu+2Ln+3Cu+1Se3 composition.
References
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Journal ArticleDOI
Device Characteristics of CZTSSe Thin‐Film Solar Cells with 12.6% Efficiency
Journal ArticleDOI
Solar cell efficiency tables (version 54)
Martin A. Green,Ewan D. Dunlop,Dean H. Levi,Jochen Hohl-Ebinger,Masahiro Yoshita,Anita Ho-Baillie +5 more
Journal ArticleDOI
Cu2ZnSnSe4 Thin‐Film Solar Cells by Thermal Co‐evaporation with 11.6% Efficiency and Improved Minority Carrier Diffusion Length
Yun Seog Lee,Talia S. Gershon,Oki Gunawan,Teodor K. Todorov,Tayfun Gokmen,Yudistira Virgus,Supratik Guha +6 more
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Band alignments of different buffer layers (CdS, Zn(O,S), and In2S3) on Cu2ZnSnS4
TL;DR: In this article, the authors used X-ray Photoelectron spectroscopy (XPS) and Near Edge Xray Absorption Fine Structure (NEXAFS) measurements to determine the Conduction Band Offset (CBO) of different buffer/CZTS heterojunctions.
Journal ArticleDOI
Numerical modeling of intra-band tunneling for heterojunction solar cells in SCAPS
TL;DR: In this article, the effect of intra-band tunneling on the current transport properties of the CuI/CuInS2 interface has been investigated and the authors conclude that the effect has no impact on cell efficiency.