Amorphous organic semiconductor thin films are prepared on temperature-controlled substrates by excimer laser ablation (ELA) of 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA) or PTCDAICo mixture target with a 308(XeCl) pulsed excimer laser beam. Drastic increase in conductivity was observed along with decrease in the IR peak intensities related to the side groups of PTCDA monomers for films prepared on substrates above 200°C. Electric conductivity of a film prepared on a substrate at 300°C comes up to 10 -1 Scm-1 . Although carbon radicals are detected to some extent, indicating incomplete polymerization. Raman spectroscopic measurement reveals that this film basically consists of polyperinaphthalene (PPN) structure. This material is named polyperinaphthlenic organic semiconductor (PPNOS). ELA of mixture target of PTCDA and Co enables us to obtain PPNOS at room temperature. Electrochemical doping of PPNOS films with lithium ion suggests the passable performance of this film as anode electrodes of ultra thin rechargeable lithium ion batteries.
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