Open AccessРазработка и исследование фотовольтаических структур на основе слоев квантовых точек PbS с различными лигандами
Author(s) -
M. A. Zvaigzne,
A. E. Aleksandrov,
Я.В. Гольтяпин,
D. A. Lypenko,
А. Р. Тамеев,
V. R. Nikitenko,
А А Чистяков
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.22.46918.17382
Subject(s) - photoconductivity , photocurrent , lead sulfide , quantum dot , pedot:pss , materials science , charge carrier , ligand (biochemistry) , optoelectronics , electrode , charge (physics) , molecule , chemistry , nanotechnology , physics , biochemistry , receptor , organic chemistry , layer (electronics) , quantum mechanics
The photoconductivity of condensates of lead-sulfide quantum dots (QDs)—QD solids—with various organic ligands is studied. It is demonstrated that the QD solid photoconductivity increases exponentially with a reduction in length of ligand molecules and does not depend on their chemical structures, since it is governed by hopping transport of charge carriers. In contrast, the photocurrent in photovoltaic ITO/PEDOT: PSS/PbS/ZnO/Al elements depends on the ligand structure, since this structure sets the positions of QD energy levels and thus affects the efficiency of charge carrier transfer to electrodes. The difference between mechanisms of generation of photoconductivity and photovoltaic currents is discussed.