Light harvesting enhancement upon incorporating alloy structured CdSeXTe1−X quantum dots in DPP:PC61BM bulk heterojunction solar cells

Soltani R, Katbab AA, Schaumberger K, Gasparini N, Brabec C, Rechberger S, Spiecker E, Alabau AG, Ruland A, Saha A, Guldi DM, Sgobba V, Ameri T (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Journal of Materials Chemistry C Royal Society of Chemistry

Publisher: Royal Society of Chemistry

Book Volume: 5

Pages Range: 654-662

Journal Issue: 3

DOI: 10.1039/c6tc04308a

Abstract

Hybrid solar cells based on the pDPP5T-2 electron donating polymer, [6,6]-phenyl-C-butyric acid methyl ester (PCBM) and cadmium selenide telluride (CdSeTe) quantum dots (QDs) are fabricated and their photovoltaic performance and optoelectronic properties are investigated as a function of QD loading. The power conversion efficiency (PCE) of hybrid solar cells is improved up to 5.11% for the device containing 4 wt% of QDs which is mainly due to the enhancement in short circuit current density (J) resulting from increased light harvesting. A full-fledged study is performed on the microstructure, charge transfer/transport and recombination mechanisms of our ternary hybrid solar cells by employing various advanced techniques. The transmission electron microscopy (TEM) results reveal the non-agglomerated and uniform distribution of the CdSeTe QDs within the pDPP5T-2:PCBM host matrix at low QD concentrations. Transient absorption spectroscopy (TAS) showed a slower charge carrier recombination rate due to the introduction of QDs into the photoactive layer. It can be attributed to the more efficient exciton dissociation in ternary systems. These findings are consistent with the photovoltaic properties of the device.

Authors with CRIS profile

Kerstin Schaumberger Nicola Gasparini Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Stefanie Rechberger Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Avishek Saha Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I Tayebeh Ameri Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern) DE Germany (DE) University of Wollongong (UOW) AU Australia (AU) Amirkabir University of Technology (AUT) / دانشگاه صنعتی امیرکبیر IR Iran, Islamic Republic of (IR)

How to cite

APA:

Soltani, R., Katbab, A.A., Schaumberger, K., Gasparini, N., Brabec, C., Rechberger, S.,... Ameri, T. (2017). Light harvesting enhancement upon incorporating alloy structured CdSeXTe1−X quantum dots in DPP:PC61BM bulk heterojunction solar cells. Journal of Materials Chemistry C, 5(3), 654-662. https://doi.org/10.1039/c6tc04308a

MLA:

Soltani, Rezvan, et al. "Light harvesting enhancement upon incorporating alloy structured CdSeXTe1−X quantum dots in DPP:PC61BM bulk heterojunction solar cells." Journal of Materials Chemistry C 5.3 (2017): 654-662.

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