Synthesis of main-chain metallo-copolymers containing donor and acceptor bis-terpyridyl ligands for photovoltaic applications.
Two random (Zn(II)-based P1-P2) and two alternating (Ru(II)-based P3-P4) metallo-copolymers containing bis-terpyridyl ligands with various central donor (i.e., fluorene or carbazole) and acceptor (i.e., benzothiadiazole) moieties were synthesized. The effects of electron donor-acceptor interactions with metal (Zn(II) and Ru(II)) ions on their thermal, optical, and electrochemical properties were investigated. Because of the strong ICT transitions between donor and acceptor ligands in both Zn(II)- and Ru(II)-based metallo-coplymers and MLCT transitions in Ru(II)-based metallo-coplymers, the absorption spectra covered a broad range of 260-750 nm with the band gaps of 1.57-1.77 eV. In addition, the introduction of Ru(II)-based metallo-coplymer P4 mixed with PC(60)BM as an active layer of the BHJ solar cell device exhibited the highest PCE value up to 0.90%.
Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan, ROC.
Harihara
H
Padhy
Mohan
M
Ramesh
Dhananjaya
D
Patra
Rudrakanta
R
Satapathy
Murali Krishna
MK
Pola
Hsuan-Chih
HC
Chu
Chih-Wei
CW
Chu
Kung-Hwa
KH
Wei
Hong-Cheu
HC
Lin
D060326:Chemistry Techniques, Synthetic; D015394:Molecular Structure; D010777:Photochemistry / Q000295:instrumentation*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
C517923:(2,2'-6',2'')-terpyridine; D011108:Polymers; D011725:Pyridines; D012428:Ruthenium