Photovoltaic Materials, Devices, and Technologies

Hybrid solar cells of micro/mesoporous Zn(OH)2 and its graphite composites sensitized by CdSe quantum dots

[+] Author Affiliations
SM Z. Islam

City College of New York, Department of Electrical Engineering, 160 Convent Avenue, New York 10031

City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, 160 Convent Avenue, New York 10031

Taposh Gayen

City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, 160 Convent Avenue, New York 10031

Fordham University, Department of Physics and Engineering Physics, 441 East Fordham Road, Bronx, New York 10458

Naing Tint

City College of New York, Department of Electrical Engineering, 160 Convent Avenue, New York 10031

City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, 160 Convent Avenue, New York 10031

Lingyan Shi

City College of New York, Department of Biomedical Engineering, 160 Convent Avenue, New York 10031

Amani M. Ebrahim

City College of New York, Department of Chemistry, 160 Convent Avenue, New York 10031

Mykola Seredych

City College of New York, Department of Chemistry, 160 Convent Avenue, New York 10031

Teresa J. Bandosz

City College of New York, Department of Chemistry, 160 Convent Avenue, New York 10031

Robert Alfano

City College of New York, Department of Electrical Engineering, 160 Convent Avenue, New York 10031

City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Department of Physics, 160 Convent Avenue, New York 10031

J. Photon. Energy. 4(1), 043098 (Feb 18, 2014). doi:10.1117/1.JPE.4.043098
History: Received August 15, 2013; Revised December 23, 2013; Accepted January 6, 2014
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Abstract.  Quantum efficiencies (QEs) of innovative hybrid solar cells fabricated using micro/mesoporous zinc (hydr)oxide and its graphite-based composites sensitized by semiconductor quantum dots (SQDs) are reported. High absorption coefficient of CdSe SQDs and the wide band gap of zinc (hydr)oxide and its composites with graphite oxide (GO) are essential to achieve solar cells of higher QEs. Hybrid solar cells are fabricated from zinc (hydr)oxide and its composites (with 2 and 5 wt.% of graphite oxides, termed as, ZnGO-2 and ZnGO-5, respectively) while using potassium iodide or perovskite as an electrolyte. A two-photon fluorescence (TPF) imaging technique was used to determine the internal structure of the solar cell device. The photocurrent and current-voltage measurements were used to measure short-circuit current and open-circuit voltage to calculate the fill factor and QE of these solar cells. The highest QE (up to 10.62%) is realized for a ZnGO-2-based solar cell using potassium iodide as its electrolyte and the CdSe quantum dot as its sensitizer.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

SM Z. Islam ; Taposh Gayen ; Naing Tint ; Lingyan Shi ; Amani M. Ebrahim, et al.
"Hybrid solar cells of micro/mesoporous Zn(OH)2 and its graphite composites sensitized by CdSe quantum dots", J. Photon. Energy. 4(1), 043098 (Feb 18, 2014). ; http://dx.doi.org/10.1117/1.JPE.4.043098


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