Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions

0375016 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
Rezek, Bohuslav - Čermák, Jan - Kromka, Alexander - Ledinský, Martin - Hubík, Pavel - Mareš, Jiří J. - Purkrt, Adam - Cimrová, Věra - Fejfar, Antonín - Kočka, Jan
Synthesis, structure, and opto-electronic properties of organic-based nanoscale heterojunctions.
Nanoscale Research Letters. Roč. 6, March (2011), 238/1-238/12. ISSN 1931-7573. E-ISSN 1556-276X
Grant CEP: GA ČR GD202/09/H041; GA MŠMT(CZ) LC06040; GA AV ČR KAN400100701; GA MŠMT LC510; GA AV ČR(CZ) IAAX00100902; GA MŠMT(CZ) 1M06031
Výzkumný záměr: CEZ:AV0Z10100521; CEZ:AV0Z40500505
Klíčová slova: nanocrystalline diamond * hydrogen-terminated diamond * oxygen-terminated diamond * diamond transistor * proteins * fetal bovine serum (FBS)
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.726, rok: 2011

Enormous research effort has been put into optimizing organic-based opto-electronic systems for efficient generation of free charge carriers. This optimization is mainly due to typically high dissociation energy (0.1-1 eV) and short diffusion length (10 nm) of excitons in organic materials. Inherently, interplay of microscopic structural, chemical, and opto-electronic properties plays crucial role. We show that employing and combining advanced scanning probe techniques can provide us significant insight into the correlation of these properties. We demonstrate benefits of this multi-dimensional characterizations on (i) bulk heterojunction of fully organic composite films, indicating differences in blend quality and component segregation leading to local shunts of photovoltaic cell, and (ii) thin-film heterojunction of polypyrrole (PPy) electropolymerized on hydrogen-terminated diamond, indicating covalent bonding and transfer of charge carriers from PPy to diamond.
Trvalý link: http://hdl.handle.net/11104/0207793