Open AccessФотофизика полупроводникового полимерного нанокомпозита с фуллереном С-=SUB=-60-=/SUB=- и эндоэдральным металлофуллереном Ho@C-=SUB=-82-=/SUB=-
Author(s) -
И.Е. Кареев,
В.П. Бубнов,
Э.К. Алиджанов,
С.Н. Пашкевич,
Ю.Д. Лантух,
С.Н. Летута,
Д.А. Раздобреев
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.01.48755.548
Subject(s) - metallofullerene , photoexcitation , fullerene , materials science , quenching (fluorescence) , exciton , heterojunction , polymer , acceptor , doping , organic semiconductor , charge carrier , endohedral fullerene , photochemistry , optoelectronics , chemistry , atomic physics , excited state , fluorescence , organic chemistry , condensed matter physics , physics , quantum mechanics , composite material
The photoexcitation energy transfer was studied in donor-acceptor systems (DA) formed from a mixture of the semiconductor polymer poly [2-methoxy-5- (2`-ethylhexyloxy) -1,4-phenylenevinylene] (MEH-PPV) with C60 fullerene and endohedral metallofullerene Ho@C82. A significant effect of the exciton migration between the polymer units on the quenching of MEH-PPV luminescence has been established. The Foerster radii of nonradiative energy transfer for the investigated DA systems are estimated. It is shown that the DA system formed using endohedral metallofullerenes is the most effective. Based on MEH-PPV, model photovoltaic cells with different doping levels C60 and Ho@C82 were formed. For the formed cells, the spectral sensitivity of the Photo-EMF and the kinetics of the increase in the Photo-EMF signal under pulsed irradiation were measured. The mobility of charge carriers in the studied polymer composites was estimated. It was found that a change in the concentration of endohedral metallofullerene within 1-2% allows you to change the effective mobility of free carriers of the polymer heterojunction.