TY - JOUR
T1 - Single Component Organic Solar Cells Based on Oligothiophene-Fullerene Conjugate
AU - Nguyen, Thanh Luan
AU - Lee, Tack Ho
AU - Gautam, Bhoj
AU - Park, Song Yi
AU - Gundogdu, Kenan
AU - Kim, Jin Young
AU - Woo, Han Young
N1 - Funding Information:
Dr. T. L. Nguyen, Prof. H. Y. Woo Department of Chemistry Korea University Seoul 136-713, Republic of Korea E-mail: hywoo@korea.ac.kr T. H. Lee, S. Y. Park, Prof. J. Y. Kim Department of Energy Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919, Republic of Korea E-mail: jykim@unist.ac.kr Dr. B. Gautam, Prof. K. Gundogdu Department of Physics North Carolina State University Raleigh, NC 27695, USA E-mail: kenan_gundogdu@ncsu.edu The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201702474.
Funding Information:
T.L.N. and T.H.L. contributed equally to this work. This work was supported by the National Research Foundation (NRF) of Korea (Nos. 2016M1A2A2940911, 2015M1A2A2057506, and 2012M3A6A7055540). TAS experiment carried out at North Carolina State University was supported by Office of Naval Research (ONR) Grant No. N000141310526 P00002. The 500 MHz NMR data were collected in the NMR Laboratory of center for Molecular Spectroscopy, Institute for Basic Science, in Korea University.
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/10/19
Y1 - 2017/10/19
N2 - A new donor (D)–acceptor (A) conjugate, benzodithiophene-rhodanine–[6,6]-phenyl-C61 butyric acid methyl ester (BDTRh–PCBM) comprising three covalently linked blocks, one of p-type oligothiophene containing BDTRh moieties and two of n-type PCBM, is designed and synthesized. A single component organic solar cell (SCOSC) fabricated from BDTRh–PCBM exhibits the power conversion efficiency (PCE) of 2.44% and maximum external quantum efficiency of 46%, which are the highest among the reported efficiencies so far. The SCOSC device shows efficient charge transfer (CT, ≈300 fs) and smaller CT energy loss, resulting in the higher open-circuit voltage of 0.97 V, compared to the binary blend (BDTRh:PCBM). Because of the integration of the donor and acceptor in a single molecule, BDTRh-PCBM has a specific D–A arrangement with less energetic disorder and reorganization energy than blend systems. In addition, the SCOSC device shows excellent device and morphological stabilities, showing no degradation of PCE at 80 °C for 100 h. The SCOSC approach may suggest a great way to suppress the large phase segregation of donor and acceptor domains with better morphological stability compared to the blend device.
AB - A new donor (D)–acceptor (A) conjugate, benzodithiophene-rhodanine–[6,6]-phenyl-C61 butyric acid methyl ester (BDTRh–PCBM) comprising three covalently linked blocks, one of p-type oligothiophene containing BDTRh moieties and two of n-type PCBM, is designed and synthesized. A single component organic solar cell (SCOSC) fabricated from BDTRh–PCBM exhibits the power conversion efficiency (PCE) of 2.44% and maximum external quantum efficiency of 46%, which are the highest among the reported efficiencies so far. The SCOSC device shows efficient charge transfer (CT, ≈300 fs) and smaller CT energy loss, resulting in the higher open-circuit voltage of 0.97 V, compared to the binary blend (BDTRh:PCBM). Because of the integration of the donor and acceptor in a single molecule, BDTRh-PCBM has a specific D–A arrangement with less energetic disorder and reorganization energy than blend systems. In addition, the SCOSC device shows excellent device and morphological stabilities, showing no degradation of PCE at 80 °C for 100 h. The SCOSC approach may suggest a great way to suppress the large phase segregation of donor and acceptor domains with better morphological stability compared to the blend device.
KW - charge transfer
KW - energy loss
KW - organic photovoltaics
KW - single component solar cells
KW - transient absorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85028401183&partnerID=8YFLogxK
U2 - 10.1002/adfm.201702474
DO - 10.1002/adfm.201702474
M3 - Article
AN - SCOPUS:85028401183
SN - 1616-301X
VL - 27
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 39
M1 - 1702474
ER -