Two dibenzo[Def, Mno]chrysene‐based polymeric semiconductors: Surprisingly opposite device performances in field‐effect transistors and solar cells

Abstract

A new series of conjugated polymers containing dibenzo [def, mno]chrysene units were successfully designed and synthesized to investigate their physical properties and device performances in field-effect transistors and photovoltaic cells. Two polymers, namely poly(4,10-bithiophene-6,12-bis(2-decyltetradecyloxy)-dibezo[def, mno]chrysene) (PTTC) and poly(2,2 0 -thiophenevinylenthiophene-4,10-[6,12-bis(2-decyltetra-, exhibited similar light absorption, electrochemical characteristics, and theoretical electronic structures. However, they behaved very differently when used in thin-film transistors and solar cells. The PTTC polymer with two thiophene groups had better charge transport behavior, whereas the PTVTC polymer with two thiophene units connected by a vinyl group exhibited higher efficiency in bulk heterojunction photovoltaic cells. These results were discussed in terms of their nanostructural bulk morphologies established from transmission electron microscopy and two-dimensional grazing incidence wide angle X-ray scattering analyses. V C 2016 Wiley Periodicals, Inc. J.

Versatile nature of anthanthrone based polymers as active multifunctional semiconductors for various organic electronic devices

“…Specifically, the homopolymer PANT-based transistors display a peak mobility of 2.2×10 -3 cm 2 V -1 s -1 at the optimized thermal annealing temperature of 200 o C (Figure 3a and Table 2). In comparison with the reported PTTC and PTVTC polymers (similarly with electron-rich groups along the backbone), 40 the backbone of PANT polymer resulted improvement in crystallinity observed from the DSC curve and AFM image (vide infra) data and this is a key parameter, which enhances the hole mobility. Further work on the improvement of backbone coplanarity and crystallinity may significantly enhance the mobility in OFETs, and we have been evaluating design principles via modelling study.…”

New Fused Pyrrolopyridine‐Based Copolymers for Organic Solar Cell

“…Although great effort has been expended to develop new donor materials, designs for donor and acceptor units are limited. The donor unit materials for D–A copolymers includes benzothiadiazole (BDT), dibenzo[b,b′]thieno[2,3‐f:5,4‐f′]bis[1]benzothiophene (DBTBT), carbazole, dialkoxy naphthalene, dialkoxy phenylene, thiophene and naphtha[2,1‐b:3,4‐b’]dithiophene, and phenanthro[1,10,9,8‐cdefg]carbazole …”

Thermally Stable Dibenzo[def,mno]chrysene‐Based Polymer Solar Cells: Effect of Thermal Annealing on the Morphology and Photovoltaic Performances

“…The dibenzo[def,mno]chrysene‐based donor polymers, PTVTC and PTTC, were successfully synthesized, and reported by previous studies . PC 71 BM used as the electron acceptor was purchased from Nano‐C, Inc. Chlorinated solvents were purchased from Sigma‐Aldrich.…”