Journal ArticleDOI
Band-structure, optical properties, and defect physics of the photovoltaic semiconductor SnS
Julien Vidal,Stephan Lany,Mayeul d'Avezac,Alex Zunger,Andriy Zakutayev,Jason Francis,Janet Tate +6 more
TLDR
In this paper, the authors employ both theory and experiment to assess the PV relevant properties of SnS and clarify on whether SnS has an indirect or direct band gap and what is the minority carrier effective mass as a function of the film orientation.Abstract:
SnS is a potential earth-abundant photovoltaic (PV) material. Employing both theory and experiment to assess the PV relevant properties of SnS, we clarify on whether SnS has an indirect or direct band gap and what is the minority carrier effective mass as a function of the film orientation. SnS has a 1.07 eV indirect band gap with an effective absorption onset located 0.4 eV higher. The effective mass of minority carrier ranges from 0.5 m0 perpendicular to the van der Waals layers to 0.2 m0 into the van der Waals layers. The positive characteristics of SnS feature a desirable p-type carrier concentration due to the easy formation of acceptor-like intrinsic Sn vacancy defects. Potentially detrimental deep levels due to SnS antisite or S vacancy defects can be suppressed by suitable adjustment of the growth condition towards S-rich.read more
Citations
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Journal ArticleDOI
Charge transportation mechanisms in TiO2/SnS/Ag solar cells
TL;DR: In this article, the effect of deposition parameters including annealing temperature and film thickness on the role of mentioned properties was investigated with an emphasis on the band alignments and charge space limited current (SCLC) behavior.
Journal ArticleDOI
Facile Chemical Bath Synthesis of SnS Nanosheets and Their Ethanol Sensing Properties.
Wei Shan,Zhengqian Fu,Mingsheng Ma,Zhifu Liu,Zhenggang Xue,Jiaqiang Xu,Faqiang Zhang,Yongxiang Li +7 more
TL;DR: The sensors of Tin(II) monosulfide nanosheets synthesized using SnCl4•5H2O and S powders as raw materials showed excellent selectivity for the detection of ethanol over acetone, methanol, and ammonia gases, which indicates the SnS nanOSheets are promising for high-performance ethanol gas sensing applications.
Journal ArticleDOI
SnS thin films grown by sulfurization of evaporated Sn layers: Effect of sulfurization temperature and pressure
TL;DR: In this paper, the effect of sulfurization parameters, such as temperature and pressure, on the properties of tin sulfide layers has been investigated, and the direct band gap energy about 1.2 eV has been determined.
Journal ArticleDOI
An Enzymatic Glucose Sensor Composed of Carbon-Coated Nano Tin Sulfide
TL;DR: A biosensor based on a glucose oxidase (GOx) immobilized, carbon-coated tin sulfide (SnS) assembled on a glass carbon electrode (GCE) was developed, and its direct electrochemistry was investigated.
Journal ArticleDOI
Structural, optical and electrical studies of DC-RF magnetron co-sputtered Cu, In & Ag doped SnS thin films for photovoltaic applications
TL;DR: In this paper, the tuning of optical and electrical properties of SnS through the incorporation of Cu, In and Ag atom without altering its chemical and crystal structural properties, using DC-RF magnetron co-sputtering technique with an in-situ substrate temperature of 400 °C.
References
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From ultrasoft pseudopotentials to the projector augmented-wave method
Georg Kresse,Daniel P. Joubert +1 more
TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
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Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
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Journal ArticleDOI
19·9%‐efficient ZnO/CdS/CuInGaSe2 solar cell with 81·2% fill factor
Ingrid Repins,Miguel A. Contreras,Brian Egaas,Clay DeHart,John Scharf,Craig L. Perkins,Bobby To,Rommel Noufi +7 more
TL;DR: In this paper, the authors reported a new record total area efficiency of 19·9% for thin-film solar cells using three-stage co-evaporation with a modified surface termination.
Journal ArticleDOI
High‐Efficiency Solar Cell with Earth‐Abundant Liquid‐Processed Absorber
TL;DR: A non-vacuum, slurry-based coating method that combines advantages of both solution processing and particlebased deposition is shown, enabling fabrication of Cu2ZnSn(Se,S)4 devices with over 9.6% efficiency—a factor of five performance improvement relative to previous attempts to use highthroughput ink-based approaches and >40% higher than previous record devices prepared using vacuum-based methods.
Journal ArticleDOI
Materials availability expands the opportunity for large-scale photovoltaics deployment.
TL;DR: A roadmap emphasizing low-cost alternatives that could become a dominant new approach for photovoltaics research and deployment is developed and it is found that devices performing below 10% power conversion efficiencies deliver the same lifetime energy output as those above 20% when a 3/4 material reduction is achieved.