Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites

Eck, Michael; Van Pham, Chuyen; Züfle, Simon; Neukom, Martin; Sessler, Martin; Scheunemann, Dorothea; Erdem, Emre; Weber, Stefan; Borchert, Holger; Ruhstaller, Beat; Krüger, Michael

doi:10.1039/c4cp01566e

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites
Authors:	Eck, Michael Van Pham, Chuyen Züfle, Simon Neukom, Martin Sessler, Martin Scheunemann, Dorothea Erdem, Emre Weber, Stefan Borchert, Holger Ruhstaller, Beat Krüger, Michael
DOI:	10.1039/c4cp01566e
Published in:	Physical Chemistry Chemical Physics
Volume(Issue):	16
Issue:	24
Page(s):	12251
Pages to:	12260
Issue Date:	2014
Publisher / Ed. Institution:	Royal Society of Chemistry
ISSN:	1463-9076 1463-9084
Language:	English
Subject (DDC):	621.3: Electrical, communications, control engineering
Abstract:	We present a significant efficiency enhancement of hybrid bulk heterojunction solar cells by utilizing CdSe quantum dots attached to reduced graphene oxide (rGO) as the electron accepting phase, blended with the PCPDTBT polymer. The quantum dot attachment to rGO was achieved following a self-assembly approach, recently developed, using thiolated reduced graphene oxide (TrGO) to form a TrGO–CdSe nanocomposite. Therefore, we are able to obtain TrGO–CdSe quantum dot/PCPDTBT bulk-heterojunction hybrid solar cells with power conversion efficiencies of up to 4.2%, compared with up to 3% for CdSe quantum dot/PCPDTBT devices. The improvement is mainly due to an increase of the open-circuit voltage from 0.55 V to 0.72 V. We found evidence for a significant change in the heterojunction donor–acceptor blend nanomorphology, observable by a more vertical alignment of the TrGO-quantum dot nanocomposites in the z-direction and a different nanophase separation in the x–y direction compared to the quantum dot only containing device. Moreover, an improved charge extraction and trap state reduction were observed for TrGO containing hybrid solar cells.
URI:	https://digitalcollection.zhaw.ch/handle/11475/6932
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

Files in This Item:

There are no files associated with this item.

Show full item record

Eck, M., Van Pham, C., Züfle, S., Neukom, M., Sessler, M., Scheunemann, D., Erdem, E., Weber, S., Borchert, H., Ruhstaller, B., & Krüger, M. (2014). Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites. Physical Chemistry Chemical Physics, 16(24), 12251–12260. https://doi.org/10.1039/c4cp01566e

Eck, M. et al. (2014) ‘Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites’, Physical Chemistry Chemical Physics, 16(24), pp. 12251–12260. Available at: https://doi.org/10.1039/c4cp01566e.

M. Eck et al., “Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites,” Physical Chemistry Chemical Physics, vol. 16, no. 24, pp. 12251–12260, 2014, doi: 10.1039/c4cp01566e.

ECK, Michael, Chuyen VAN PHAM, Simon ZÜFLE, Martin NEUKOM, Martin SESSLER, Dorothea SCHEUNEMANN, Emre ERDEM, Stefan WEBER, Holger BORCHERT, Beat RUHSTALLER und Michael KRÜGER, 2014. Improved efficiency of bulk heterojunction hybrid solar cells by utilizing CdSe quantum dot–graphene nanocomposites. Physical Chemistry Chemical Physics. 2014. Bd. 16, Nr. 24, S. 12251–12260. DOI 10.1039/c4cp01566e

Eck, Michael, Chuyen Van Pham, Simon Züfle, Martin Neukom, Martin Sessler, Dorothea Scheunemann, Emre Erdem, et al. 2014. “Improved Efficiency of Bulk Heterojunction Hybrid Solar Cells by Utilizing CdSe Quantum Dot–Graphene Nanocomposites.” Physical Chemistry Chemical Physics 16 (24): 12251–60. https://doi.org/10.1039/c4cp01566e.

Eck, Michael, et al. “Improved Efficiency of Bulk Heterojunction Hybrid Solar Cells by Utilizing CdSe Quantum Dot–Graphene Nanocomposites.” Physical Chemistry Chemical Physics, vol. 16, no. 24, 2014, pp. 12251–60, https://doi.org/10.1039/c4cp01566e.