TY - JOUR
T1 - Two Donor-One Acceptor Random Terpolymer Comprised of Diketopyrrolopyrrole Quaterthiophene with Various Donor π-Linkers for Organic Photovoltaic Application
AU - Sambathkumar, B.
AU - Shyam Vinod Kumar, P.
AU - Deepakrao, F. Shantanu
AU - Kumar Iyer, S. Sundar
AU - Subramanian, V.
AU - Datt, Ram
AU - Gupta, Vinay
AU - Chand, Suresh
AU - Somanathan, N.
N1 - Funding Information:
The authors thank Council of Scientific and Industrial Research (CSIR), India, for financial support through TAPSUN- NWP 54 project. Authors would also like to thank Dr A. Ajayaghosh, J. D. Sudha, and R. Ramakrishnan Photo sciences and Photonics group, NIIST, Trivandrum, India for AFM measurement.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - A series of terpolymers based on diketopyrrolopyrrole (DPP) and quaterthiophene (QT) connected randomly using various electron-donating π-linkers such as fluorene (P4TFDPP), thiophene (P5TDPP), phenyl (P4TPDPP), and vinyl (P4TVDPP) have been designed and synthesized via Suzuki and Stille polymerization. In this work we studied the influence of the π-linker and the effect on their photophysical properties, and energy levels, band gap, packing nature, surface morphology, carrier mobility, and photovoltaic behavior were analyzed using various techniques and correlated with quantum chemical calculation. Bulk heterojunction (BHJ) solar cells were fabricated using these polymers as donor materials and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as an acceptor. A high molecular weight with larger absorption coefficient and high hole mobility were achieved for copolymer P4TFDPP compared to other copolymers. The best photovoltaic performances were achieved for the polymer P4TFDPP with a power conversion efficiency (PCE) of 4.9%, with Voc = 0.88 V, Jsc = 9.4 mA/cm2, and FF = 59%, which is the highest PCE, Jsc, and FF for the fluorene-DPP copolymeric system compared to that previously reported in the literature, while P5TDPP, P4TVDPP, and P4TPDPP show a PCE of 4.1%, 2.9%, and 3.9%, respectively. This work exhibits the importance of selecting a proper π-linker in the random terpolymer to provide an efficient approach for enhancing the PCE in polymer solar cells. (Graph Presented).
AB - A series of terpolymers based on diketopyrrolopyrrole (DPP) and quaterthiophene (QT) connected randomly using various electron-donating π-linkers such as fluorene (P4TFDPP), thiophene (P5TDPP), phenyl (P4TPDPP), and vinyl (P4TVDPP) have been designed and synthesized via Suzuki and Stille polymerization. In this work we studied the influence of the π-linker and the effect on their photophysical properties, and energy levels, band gap, packing nature, surface morphology, carrier mobility, and photovoltaic behavior were analyzed using various techniques and correlated with quantum chemical calculation. Bulk heterojunction (BHJ) solar cells were fabricated using these polymers as donor materials and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as an acceptor. A high molecular weight with larger absorption coefficient and high hole mobility were achieved for copolymer P4TFDPP compared to other copolymers. The best photovoltaic performances were achieved for the polymer P4TFDPP with a power conversion efficiency (PCE) of 4.9%, with Voc = 0.88 V, Jsc = 9.4 mA/cm2, and FF = 59%, which is the highest PCE, Jsc, and FF for the fluorene-DPP copolymeric system compared to that previously reported in the literature, while P5TDPP, P4TVDPP, and P4TPDPP show a PCE of 4.1%, 2.9%, and 3.9%, respectively. This work exhibits the importance of selecting a proper π-linker in the random terpolymer to provide an efficient approach for enhancing the PCE in polymer solar cells. (Graph Presented).
UR - http://www.scopus.com/inward/record.url?scp=85000981986&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.6b07479
DO - 10.1021/acs.jpcc.6b07479
M3 - Article
AN - SCOPUS:85000981986
SN - 1932-7447
VL - 120
SP - 26609
EP - 26619
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 47
ER -