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A Multifunction Heterojunction Formed Between Pentacene and a Single‐Crystal Silicon Nanomembrane
Author(s) -
Seo JungHun,
Oh TaeYeon,
Park Jungho,
Zhou Weidong,
Ju ByeongKwon,
Ma Zhenqiang
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201203309
Subject(s) - materials science , optoelectronics , responsivity , heterojunction , pentacene , wafer , silicon , diode , silicon on insulator , substrate (aquarium) , homojunction , transmittance , quantum efficiency , nanotechnology , layer (electronics) , photodetector , thin film transistor , oceanography , geology
A mesh patterned n‐type single‐crystalline silicon nanomembrane (SiNM) created from a silicon‐on‐insulator (SOI) wafer is complementally combined with a p‐type pentacene layer to form a heterogeneous p‐n junction on a flexible plastic substrate. Excellent rectifying characteristics are obtained from the heterogeneous p‐n diode. The diode also exhibits photosensitivity at visible wavelengths with a photo‐to‐dark current ratio exceeding four orders, a responsivity of 0.7 A/W, and an external quantum efficiency of 21.9% at 633 nm. Over 60% average transmittance in the visible spectrum is measured from the heterogeneous multilayer junction on a plastic substrate. Outstanding mechanical bending characteristics are observed with up to 1.08% of strain applied to the diode. These results suggest that organic‐inorganic heterogeneous integration may be a viable strategy to build flexible organic‐inorganic heterojunction devices and thus enable a number of novel multifunctional applications.