PMID- 25323762
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150521
LR  - 20141128
IS  - 1521-3765 (Electronic)
IS  - 0947-6539 (Linking)
VI  - 20
IP  - 50
DP  - 2014 Dec 8
TI  - Regioisomeric effects on the electronic features of indenothiophene-bridged 
      D-pi-A'-A DSSC sensitizers.
PG  - 16574-82
LID - 10.1002/chem.201403584 [doi]
AB  - Two D-pi-A'-A regioisomers (A-IDT-D and D-IDT-A) featuring 
      4,4'-di-p-tolyl-4 H-indeno[1,2-b]-thiophene as a pi linker (pi) between the 
      diarylamino donor (D) and the pyrimidine-cyanoacrylic acid acceptor (A'-A) have 
      been successfully synthesized and characterized as efficient sensitizers for the 
      dye-sensitized solar cells (DSSCs). The different arrangements of the D and A'-A 
      blocks on the unsymmetrical indenothiophene (IDT) core render the dipole of IDT 
      being along (A-IDT-D) or opposite (D-IDT-A) to the direction of intramolecular 
      (donor-to-acceptor) charge transfer, and thus induce variations in the physical 
      properties. The experimental observations correlated well with the theoretical 
      analyses, clearly revealing the trade-off between the molar extinction 
      coefficient (epsilon) and the S0 -->S1 transition energy. As a result, a superior epsilon value 
      was observed for D-IDT-A, whereas a bathochromic shift in the absorption occurred 
      in A-IDT-D. The larger epsilon value of D-IDT-A together with its more favorable energy 
      level relative to TiO2 led to a higher power conversion efficiency of 7.41 % for 
      the D-IDT-A-based DSSC, retaining approximately 95 % of the N719-based DSSC 
      efficiency. This work manifests the clear structure-property relationship for the 
      case of donor and acceptor components being connected by an unsymmetrical pi 
      linker and provides insights for molecular engineering of organic sensitizers.
CI  - (c) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
FAU - Chou, Shu-Hua
AU  - Chou SH
AD  - Department of Chemistry, National Taiwan University, Taipei 10617 (Taiwan).
FAU - Tsai, Chih-Hung
AU  - Tsai CH
FAU - Wu, Chung-Chih
AU  - Wu CC
FAU - Kumar, Dhirendra
AU  - Kumar D
FAU - Wong, Ken-Tsung
AU  - Wong KT
LA  - eng
PT  - Journal Article
DEP - 20141016
PL  - Germany
TA  - Chemistry
JT  - Chemistry (Weinheim an der Bergstrasse, Germany)
JID - 9513783
OTO - NOTNLM
OT  - donor-pi-acceptor-acceptor
OT  - dyes/pigments
OT  - indenothiophenes
OT  - intramolecular charge transfer
OT  - organic sensitizers
OT  - solar cells
EDAT- 2014/10/18 06:00
MHDA- 2014/10/18 06:01
CRDT- 2014/10/18 06:00
PHST- 2014/05/19 00:00 [received]
PHST- 2014/10/18 06:00 [entrez]
PHST- 2014/10/18 06:00 [pubmed]
PHST- 2014/10/18 06:01 [medline]
AID - 10.1002/chem.201403584 [doi]
PST - ppublish
SO  - Chemistry. 2014 Dec 8;20(50):16574-82. doi: 10.1002/chem.201403584. Epub 2014 Oct 
      16.