Organic phototransistors （OPTs） have been intensively studied in recent years due to the combined ad- vantages of phototransistors and organic semiconductors （OSCs）. However, the electrical performance of OPTs is ...Organic phototransistors （OPTs） have been intensively studied in recent years due to the combined ad- vantages of phototransistors and organic semiconductors （OSCs）. However, the electrical performance of OPTs is lar- gely limited by OSCs themselves, posing a challenge to further improve the performance of the devices. Preparing nano/mi- cro-structures of OSCs is considered as an effective way to improve the performance of OPTs. Polystyrene （PS） micro- sphere, as a kind of insulating and low-cost material, is ex- tensively used in fabricating nano/microporous structures, and the resulting devices exhibit high response to external stimuli. Therefore, we combined PS microspheres with OSCs to fabricate PS/OSC OPTs, and the Ilight/Idark ratio was en- hanced by two orders of magnitude compared with the pris- tine counterparts, which can be modulated from 46 to 1800 by controlling the diameters of PS microsphereso This strategy paves a way for developing high-performance OPTs with nano/microporous structures with potential applications in organic optoelectronics.展开更多
基金supported by the National Natural Science Foundation of China (51741302, 51603151 and 51373123)the National Key Research and Development Program of China (2017YFA0103900 and 2017YFA0103904)+1 种基金Science and Technology Foundation of Shanghai (17JC1404600)the Fundamental Research Funds for the Central Universities
文摘Organic phototransistors （OPTs） have been intensively studied in recent years due to the combined ad- vantages of phototransistors and organic semiconductors （OSCs）. However, the electrical performance of OPTs is lar- gely limited by OSCs themselves, posing a challenge to further improve the performance of the devices. Preparing nano/mi- cro-structures of OSCs is considered as an effective way to improve the performance of OPTs. Polystyrene （PS） micro- sphere, as a kind of insulating and low-cost material, is ex- tensively used in fabricating nano/microporous structures, and the resulting devices exhibit high response to external stimuli. Therefore, we combined PS microspheres with OSCs to fabricate PS/OSC OPTs, and the Ilight/Idark ratio was en- hanced by two orders of magnitude compared with the pris- tine counterparts, which can be modulated from 46 to 1800 by controlling the diameters of PS microsphereso This strategy paves a way for developing high-performance OPTs with nano/microporous structures with potential applications in organic optoelectronics.
