講演情報
[24a-1BC-8]Doping Control Using a Photoinduced Charge Transfer Reaction: From Conducting Polymers to Nanocarbon Materials
〇(D)YUQING WANG1,2, Masatou Ishihara1, Kazuhiro Kirihara1, Shohei Horike3, Qingshuo Wei1,2 (1.AIST, 2.Univ. Tsukuba, 3.Kobe Univ.)
キーワード：
Organic semiconductor、Doping、Nanocarbon
Accurate control of doping in organic semiconductors and nanocarbons is pivotal for diverse device applications in materials science. We pioneered a solid-state photoinduced charge-transfer reaction leveraging the photobase generator (PBG) 2-(9-oxoxanthen-2-yl)propionic acid 1,5,7-triazabicyclo[4.4.0]dec-5-ene to dedope highly conductive polyelectrolyte complexes like poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate. Tailoring UV-irradiation durations precisely modulates carrier density within the film over three orders of magnitude. This precision arises from the formation of the potent base 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) from PBG during UV irradiation, enabling electron transfer to polymers. Extracting carrier mobility akin to thin-film transistor operation in depletion mode becomes feasible by combining charge transfer quantification and conductivity change. This strategy successfully characterizes various conductivities in a benchmark conducting polymer PEDOT/PSS and nanocarbon materials. Recently, we expanded this approach to fabricate n-type graphene.