T. Varema

Cu2ZnSnSe4 monograin powders with different Zn/Sn concentration ratios were synthesized from binaries and elemental selenium, p-type CCu2ZnSnSe4 monograins of stannite structure had tetragonal shape with rounded edges. PL spectra showed... more

Cu2ZnSnSe4 monograin powders with different Zn/Sn concentration ratios were synthesized from binaries and elemental selenium, p-type CCu2ZnSnSe4 monograins of stannite structure had tetragonal shape with rounded edges. PL spectra showed one symmetrical band with peak position at 0.81 eV. Monograin layer solar cell structures graphite/Cu2ZnSnSe4/CdS/ZnO had open circuit voltage over 400 mV, short circuit current 15.5 mA/cm2 and FF41 %

Publication Date: 2006

Publication Name: 2006 IEEE 4th World Conference on Photovoltaic Energy Conference

Research Interests:
Solar Cell and Open Circuit Voltage

Publication Date: 2014

Publication Name: Thin Solid Films

Research Interests:
Engineering, Technology, Physical sciences, and Thin Solid Films

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Publication Date: 2011

Publication Name: Energy Procedia

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Publication Date: 2005

Publication Name: Solar Energy Materials and Solar Cells

Research Interests:
Engineering, Solar Cell, Surface modification, Physical sciences, Technological Development, and CHEMICAL SCIENCES

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Publication Date: 2008

Publication Name: Thin Solid Films

Research Interests:
Engineering, Technology, Solar Cell, Thin Film, Physical sciences, and 2 moreThin Solid Films and Chemical bath deposition

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Publication Date: 2003

Publication Name: Thin Solid Films

Research Interests:
Engineering, Technology, Solar Cell, Copper, Physical sciences, and 3 moreElectrical Properties, Thin Solid Films, and Electrochemical method

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Publication Date: 2007

Publication Name: Thin Solid Films

Research Interests:
Engineering, Technology, Solar Cell, Physical sciences, Quantum Efficiency, and Thin Solid Films

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ABSTRACT CuInS2 films were prepared by the spray pyrolysis method using either copper-rich solutions or the recrystallization of low-crystallinity film in the presence of an intentionally deposited CuxS layer. KCN-etched films were... more

ABSTRACT CuInS2 films were prepared by the spray pyrolysis method using either copper-rich solutions or the recrystallization of low-crystallinity film in the presence of an intentionally deposited CuxS layer. KCN-etched films were characterized by XRD, SEM and EDX. The Cu/In molar ratio of 1.5–4.0 in the solution resulted in well-crystallized CuInS2 films with the mean crystallite size of 120 nm. SEM study showed nonuniform surface with irregularly placed large grain domains in the flat film. The two-step process resulted in a uniform film with the crystallite size of 50 nm. Films exhibited an In-rich composition. Solar cells based on a recrystallized absorber showed an improved quantum efficiency spectrum.

Publication Date: 2001

Publication Name: Solar Energy Materials and Solar Cells

Publication Date: 1996

Publication Name: Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996

Publication Date: 2013

Publication Name: Thin Solid Films

Research Interests: Engineering, Technology, Physical sciences, and Thin Solid Films<div>()</div>

Publication Date: 2010

Publication Name: Ceramic Transactions

Research Interests: Alternative<div>()</div>

Publication Date: 2009

Publication Name: Thin Solid Films

Publication Date: 2009

Publication Name: Advances in Materials Science and Engineering

Research Interests: Engineering, Materials Science and Engineering, Physical sciences, and CHEMICAL SCIENCES<div>()</div>

Publication Date: 2007

Publication Name: Thin Solid Films

Research Interests: Engineering, Technology, Solar Cell, Physical sciences, Thin Solid Films, and Open Circuit Voltage<div>()</div>

Publication Date: 2009

Publication Name: Solar Energy Materials and Solar Cells

Research Interests: Engineering, Solar Cell, Physical sciences, CHEMICAL SCIENCES, Single Crystal, and Cell Formation<div>()</div>

Publication Date: 2006

Publication Name: 2006 IEEE 4th World Conference on Photovoltaic Energy Conference

Research Interests: Solar Cell and Open Circuit Voltage<div>()</div>

Publication Date: 2014

Publication Name: Thin Solid Films

Research Interests: Engineering, Technology, Physical sciences, and Thin Solid Films<div>()</div>

Publication Date: 2011

Publication Name: Energy Procedia

Publication Date: 2005

Publication Name: Solar Energy Materials and Solar Cells

Research Interests: Engineering, Solar Cell, Surface modification, Physical sciences, Technological Development, and CHEMICAL SCIENCES<div>()</div>

Publication Date: 2008

Publication Name: Thin Solid Films

Publication Date: 2003

Publication Name: Thin Solid Films

Publication Date: 2007

Publication Name: Thin Solid Films

Research Interests: Engineering, Technology, Solar Cell, Physical sciences, Quantum Efficiency, and Thin Solid Films<div>()</div>

Publication Date: 2005

Publication Name: Solar Energy Materials and Solar Cells

Research Interests: Engineering, Physical sciences, and CHEMICAL SCIENCES<div>()</div>

Publication Date: 2010

Publication Name: Solar Energy Materials and Solar Cells

Research Interests: Engineering, Solar Cell, Solar Cells, Physical sciences, CHEMICAL SCIENCES, and Solid Solution<div>()</div>

Publication Date: 2011

Publication Name: Advanced Materials Research

Research Interests: Advanced Materials<div>()</div>

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Research Interests:
Engineering, Technology, Physical sciences, and Thin Solid Films

Research Interests:
Alternative

Research Interests:
Engineering, Materials Science and Engineering, Physical sciences, and CHEMICAL SCIENCES

Research Interests:
Engineering, Technology, Solar Cell, Physical sciences, Thin Solid Films, and Open Circuit Voltage

Research Interests:
Engineering, Solar Cell, Physical sciences, CHEMICAL SCIENCES, Single Crystal, and Cell Formation

Research Interests:
Solar Cell and Open Circuit Voltage

Research Interests:
Engineering, Technology, Physical sciences, and Thin Solid Films

Research Interests:
Engineering, Solar Cell, Surface modification, Physical sciences, Technological Development, and CHEMICAL SCIENCES

Research Interests:
Engineering, Technology, Solar Cell, Physical sciences, Quantum Efficiency, and Thin Solid Films

Research Interests:
Engineering, Physical sciences, and CHEMICAL SCIENCES

Research Interests:
Engineering, Solar Cell, Solar Cells, Physical sciences, CHEMICAL SCIENCES, and Solid Solution

Research Interests:
Advanced Materials