Results 181 to 190 of about 3,999 (199)

Boosting the efficiency of Cd-free kesterite/kesterite tandem solar cell: A numerical simulation approach

Physica E: Low-dimensional Systems and Nanostructures, 2022
Abstract Here we present a monolithic kesterite-based tandem solar cell to harvest sunlight from a wide spectral range. The proposed tandem structure consists of a higher band gap Cu2ZnSnS4 (CZTS) top cell and an underlying lower band gap (AgxCu1-x)2ZnSnSe4 (ACZTSe) bottom cell connected in a series circuit through a tunneling junction.
D. Mora-Herrera, Mou Pal
openaire   +1 more source

Nanostructured thermoelectric kesterite Cu2ZnSnS4

2021
To support the growing global demand for energy, new sustainable solutions are needed both economically and environmentally. Thermoelectric waste heat recovery and energy harvesting could contribute by increasing industrial process efficiency, as well as powering stand-alone devices, microgenerators, and small body appliances.The structural complexity ...
openaire   +1 more source

Growth kinetics during kesterite coevaporation

2012 38th IEEE Photovoltaic Specialists Conference, 2012
Kesterite solar cells have been considered as earth-abundant substitute to chalcopyrites. NREL's 9.2% co-evaporated kesterite solar cell is inspired by the copper-rich growth of co-evaporated chalcopyrites. The excess Cu x Se y is believed to conduct liquid-phase assisted grain growth and hence improves the device performance.
Wan-Ching Hsu, Ingrid Repins, Carolyn Beall, Glenn Teeter, Clay DeHart, Bobby To, Yang Yang, Rommel Noufi   +7 more
openaire   +1 more source

What is the bandgap of kesterite?

Solar Energy Materials and Solar Cells, 2016
Abstract There are different ways to determine the bandgap of a semiconductor. In the case of strong tailing they lead to different results. Various versions of Tauc’s plot give the gap of extended states, whereas the photoluminescence and the quantum efficiency extend into the tail states.
Susanne Siebentritt, Germain Rey, Ashley Finger, David Regesch, Jan Sendler, Thomas Paul Weiss, Tobias Bertram   +6 more
openaire   +1 more source

Kesterite CZTS nanocrystals: pH‐dependent synthesis

physica status solidi (a), 2014
The kesterite Cu2ZnSnS4 (CZTS) nanocrystals (NCs) were successfully synthesized using a relatively simple and one‐step hydrothermal route. The structural, compositional, and optical properties of the kesterite CZTS NCs have been studied in detail. The pH‐dependent CZTS phase formation has been elucidated for the first time.
Suryawanshi, M Suryawanshi, Mahesh, Shin, SW Shin, Seung Wook, Bae, WRI Bae, Woo R. I., Gurav, K Gurav, Kishor, Kang, MG Kang, Myun Gil, Agawane, G Agawane, Ganesh, Patil, P Patil, Pramod, Yun, JH Yun, Jae Ho, Lee, JY Lee, JeongYong, Moholkar, A Moholkar, Annasaheb, Kim, JH Kim, Jin Hyeok   +10 more
openaire   +2 more sources

From magnetic cubic pre-kesterite to semiconducting tetragonal kesterite Cu2ZnSnS4 nanopowders via the mechanochemically assisted route

Journal of Alloys and Compounds, 2019
Abstract Presented is a study on the mechanochemically assisted synthesis of kesterite Cu2ZnSnS4 from the elements for photovoltaic applications. Initial application of high energy ball milling under selected conditions, including the highest achievable rotation speeds up to 1000 rpm, affords a pure cubic nanophase with the nominal kesterite ...
Katarzyna Kapusta, Mariusz Drygas, Jerzy F. Janik, Piotr Jelen, Miroslaw M. Bucko, Zbigniew Olejniczak   +5 more
openaire   +1 more source

Taking a gamble on kesterites

C&EN Global Enterprise, 2018
Countless rows of solar modules sit shimmering in the desert, a dark blue ocean stretching to the horizon. This is the Tengger Desert Solar Park in central China, by some estimates the world’s largest photovoltaic array, capable of generating up to 1.5 gigawatts of power. No wonder it’s been dubbed “the Great Wall of Solar Energy.” Arrays like this are
openaire   +1 more source

Laser operation by kesterite chalcogenide nanocrystals

Optik, 2019
Abstract We demonstrate a possibility to vary structural, morphological and optoelectronics parameters for kesterite Cu2ZnSnS4 nanocrystalline films using external laser beams at 1540 nm, and 770 nm or 1064 nm, and 532 nm. The illumination is performed both by single mode laser beams as well as by bicolor coherent treatment.
A.M. El-Naggar, K. Ozga, A.A. Albassam, G. Lakshminarayana   +3 more
openaire   +1 more source

Standard Enthalpy of Kesterite (Cu2ZnSnS4) Formation

Geochemistry International, 2019
Calorimetrically determined enthalpy of kesterite (Cu2ZnSnS4) formation from simple sulfides 2CuS + ZnS + SnS → Cu2ZnSnS4 was utilized to calculate the standard enthalpy of formation of Cu2ZnSnS4 (from elements at a pressure of 105 Pa): $${{\Delta }_{f}}H_{{298.5}}^{0}$$
T. A. Stolyarova, E. G. Osadchii, A. V. Baranov   +2 more
openaire   +1 more source

Kesterites—a challenging material for solar cells

Progress in Photovoltaics: Research and Applications, 2012
ABSTRACTKesterite materials (Cu2ZnSn(S,Se)4) are made from non‐toxic, earth‐abundant and low‐cost raw materials. We summarise here the structural and electronic material data relevant for the solar cells. The equilibrium structure of both Cu2ZnSnS4 and Cu2ZnSnSe4 is the kesterite structure.
Susanne Siebentritt, Susan Schorr
openaire   +1 more source