| Issue |
EPL
Volume 110, Number 1, April 2015
|
|
|---|---|---|
| Article Number | 17006 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/110/17006 | |
| Published online | 20 April 2015 | |
Enhanced performance of isotype planar heterojunction photoresponsive organic field-effect transistors by using Ag source-drain electrodes
1 Institute of Microelectronics, School of Physical Science and Technology, Lanzhou University Lanzhou 730000, PRC
2 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University Lanzhou 730000, PRC
Received: 22 November 2014
Accepted: 28 March 2015
Pentacene/lead phthalocyanine (PbPc)-based isotype and fullerene 
/PbPc-based anisotype planar heterojunction near-infrared photoresponsive organic field-effect transistors (PhOFETs) were fabricated. We compared the performance of the isotype planar heterojunction PhOFET and the anisotype one, and dominantly investigated the effect of contact on the performance of the isotype planar heterojunction devices. The results showed that the isotype planar heterojunction device exhibits a comparable maximum photoresponsivity 
of 107 mA/W and a comparable maximum photo/dark current ratio 
of 
to the anisotype one (
of 109 mA/W and 
of 
), and exhibits superior air stability to the anisotype one. Moreover, it is surprising to find that Ag source-drain electrodes replacing Au ones yield a performance enhancement in isotype PHJ devices, this is mainly because the use of Ag source-drain electrodes enhances the photo-generated exciton dissociation efficiency at the metal/PbPc interface.
PACS: 73.40.Lq – Other semiconductor-to-semiconductor contacts, / 85.60.Dw – Photodiodes; phototransistors; photoresistors / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.