Polycrystalline tetrabenzoporphyrin organic field-effect transistors with nanostructured channels

Abstract

Solution-processed organic thin-film field-effect transistors ͑OFETs͒ were fabricated using a precursor form of the organic semiconductor tetrabenzoporphyrin ͑TBP͒ deposited on a thermal silicon oxide gate insulator patterned with nanometer-scale trenches. Thermal conversion of the precursor film to TBP was enhanced by ordered TBP aggregation in the prepatterned trenches, demonstrating precise control and placement of long-and short-range ordering of the organic semiconductor. OFETs with channels parallel to trench direction growth were found to have field-effect mobility approaching one order of magnitude greater than transistors fabricated with the channel oriented perpendicular to dendrimer growth.

Synthesis, Structures, and Optical and Electrochemical Properties of Benzoporphycenes

“…For example, use as latent pigments in photovoltaics would be an obvious extension of our recent research on tetrabenzoporphyrins. [4,5] Experimental Section General: Melting points were measured with Yanaco M500-D apparatus and were not corrected. Decomposition temperatures were measured on an SII Exstar 600 TG/DTA 6200.…”

“…Benzoporphyrins exhibit strong absorption in the far-red regions of the visible spectrum suitable for use in photodynamic therapy (PDT) applications, and good performance as solution-processable organic thin-film transistors (OTFTs). [4,5] The corresponding benzoporphycenes can be expected to have unique photo-physical and electrochemical properties, which may enhance their suitability for use in high technology fields relative to the benzoporphyrins and the parent porphycenes. Octahexylporphycene (THPcH 2 ) has been prepared so that the spectroscopy and electrochemistry of the benzoporphycenes can be compared to that of the porphycene parent compound and the corresponding dications ( 2 + ) and Ni complexes (BPcNi, BHPcNi, and THPcNi).…”

Template Synthesis of Lanthanides Complexes with 5,15-Diphenyltetrabenzoporphyrin

“…Синтез комплексов лютеция (2), иттербия (3), эрбия (4), гольмия (5), гадолиния (6) и европия (7) с 5,15-дифенилтетра-бензопорфирином (общая методика). Смесь 0.2 г (0.72 ммоль) дибензодипиррометена 1, 0.3 г (2.2 ммоль) фенилуксусной кис-лоты и 0.72 ммоль гексагидрата хлорида лантанида нагревали при температуре 320 °С в течение 1 ч, охлаждали, измельчали и экстрагировали ДМФА в аппарате Сокслета.…”

“…Уникальные физико-химиче-ские свойства металлокомплексов тетрабензопорфи-ринов обусловливают перспективность использования этих соединений, например, в тонкопленочной электро-нике, [1][2][3][4][5] медицине [6][7][8] и сенсорике. [9] Особое внимание в настоящее время привлекают мезо-арилзамещенные тетрабензопорфирины.…”

Vibronic coupling density analysis for free-base porphin cation

“…In the last two decades, porphyrinbased thin film transistors (TFTs) have been fabricated and their hole-mobilities have been measured [2][3][4][5][6][7][8]. The hole mobilities range between 10 À6 and 10 À1 cm 2 V À1 s À1 .…”