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Giant lateral photovoltaic effect in the TiO2/SiO2/p-Si heterostructure

Гигантский латеральный фотовольтаический эффект в гетероструктуре TiO2/SiO2/p-Si
Authors: Pisarenko, Tatiana; Korobtsov, Vladimir; Dimitriev, Artem; Balashev, Vyacheslav; Zheleznov, Veniamin; Yakovlev, Aleksey;

Giant lateral photovoltaic effect in the TiO2/SiO2/p-Si heterostructure

Abstract

В данной работе проведено исследование латерального фотовольтаического эффекта в структуре TiO2/SiO2/p-Si. Установлено, что гигантский латеральный фотоэффект наблюдался в гетероструктуре TiO2/SiO2/p-Si вследствие формирования в ней на границе раздела SiO2/p-Si высокого встроенного барьера. Максимальная чувствительность ЛФЭ ~600 мВ/мм наблюдается в структуре TiO2/SiO2/p-Si при толщине пленки TiO2, осажденной в течение 45 мин. Однако, нелинейность ЛФЭ в этой структуре слишком велика для практических применений. Уменьшение нелинейности достигается регулированием толщины пленки TiO2. Обнаружено, что характеристиками пригодными для оптоэлектронных устройств обладает структура, полученная при осаждении пленки TiO2 в течение 50 мин, в которой чувствительность и нелинейность ЛФЭ составляют 477 мВ/мм и 9%, соответственно. Причиной значительных величин времени нарастания и спада при импульсном освещении являются импедансные характеристики структуры TiO2/SiO2/p-Si в области контактов.

In this work, we study the lateral photovoltaic effect in the TiO2/SiO2/p-Si structure. It was found the giant lateral photoeffect occurs in the TiO2/SiO2/p-Si heterostructure due to the high built-in barrier formation at the SiO2/p-Si interface. The maximum LPE sensitivity ~600 mV/mm is observed in the TiO2/SiO2/p-Si structure under the TiO2 film deposition for 45 min. However, the LPE nonlinearity in this structure is too large for practical applications. A decrease of the nonlinearity is achieved by the TiO2 film thickness control. The structure fabricated by the TiO2 film deposition for 50 min has the LPE sensitivity and LPE nonlinearity are 477 mV/mm and 9%, respectively, which are more suitable for optoelectronic devise. The reason for the significant values of the rise time and fall time at pulsed illumination is the impedance behaviors of the TiO2/SiO2/p-Si structure in the near-contact region.

Keywords

built-in barrier, titanium dioxide, Physics, QC1-999, silicon, диоксид титана, heterostructure, латеральный фотовольтаический эффект, встроенный барьер, гетероструктура, кремний, lateral photovoltaic effect, QA1-939, interface, граница раздела, Mathematics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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