Premium
Synthesis of star‐shaped molecules with pyrene‐containing π‐conjugated units linked by an organosilicon core
Author(s) -
Ohshita Joji,
Hatanaka Yosuke,
Matsui Shigenori,
Ooyama Yousuke,
Harima Yutaka,
Kunugi Yoshihito
Publication year - 2010
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1551
Subject(s) - organosilicon , chemistry , pyrene , conjugated system , pedot:pss , molecule , thin film transistor , open circuit voltage , photovoltaic system , energy conversion efficiency , polymer chemistry , chemical engineering , optoelectronics , organic chemistry , polymer , layer (electronics) , materials science , voltage , ecology , physics , quantum mechanics , engineering , biology
Abstract Star‐shaped molecules with pyrene‐containing π‐conjugated units linked by an organosilicon core (Py 3 Si and Py 3 C) were prepared and their applications to thin‐film transistors (TFTs) and photovoltaic cells were studied. Bottom‐contact type TFTs with spin‐coated films of the star‐shaped compounds as the active layers were prepared and the field‐effect mobility (µ FET ) and I on / I off ratios were determined to be approximately 10 −5 cm 2 V −1 s −1 and 10 4 , respectively. Photovoltaic properties of Py 3 Si and Py 3 C were studied in the cells, ITO–PEDOT‐PSS–Py 3 Si or Py 3 C‐PCBM–LiF–Al. Although the power conversion efficiency (PCE) of the cells was only about 0.04%, they showed high open circuit voltages ( V oc ) of 0.8–0.9 V, indicating the high potential of this type of compound as a host material. Copyright © 2009 John Wiley & Sons, Ltd.