Nanostructured Silicon Heterojunctions for NIR Optoelectronics (CROSBI ID 635948)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Đerek, Vedran ; Glowacki, Eric Daniel ; Sariciftci, Niyazi Serdar ; Ivanda, Mile
engleski
Nanostructured Silicon Heterojunctions for NIR Optoelectronics
Silicon sensitivity for IR sensitive optoelectronic devices is limited by the 1.11 eV band-gap of bulk silicon. Extension of silicon's spectral sensitivity to NIR wavelengths beyond 1250 nm while keeping the CMOS compatibility would be beneficial to possible telecom or other optoelectronic uses. By making heterojunction optoelectronic devices based on thin films of vacuum-deposited organic semiconductors on silicon substrates it is possible to vary the barrier height of the heterojunction, and thus also the spectral response of the devices. By using micro and nano-structured silicon substrates, electronic and optical properties of structured substrates can be used to improve the device performance in comparison to using flat substrates. We present example of heterojunctions based on silicon/organic thin films of hydrogen-bonded pigment tyrian purple (6, 6′-dibromoindigo) formed by vacuum evaporation. Though the band- gap of both materials in the heterojunction is relatively high, our devices show sub silicon- bandgap IR sensitivity up to 2500 nm with responsivity of ~5 mA/W in the telecom C-band [1, 2]. We show how micro- and nano-structuring of silicon substrates prior to vacuum evaporation of organic layer significantly improves the responsivity of hybrid silicon- organic photodiodes. [1] M. Bednorz, G. J. Matt, E. D. Głowacki, T. Fromherz, C. J. Brabec, M. C. Scharber, H. Sitter, and N. S. Sariciftci, Org. Electron. 14 (2013), 1344 [2] V. Đerek, E. Głowacki, M. Sytnyk, W. Heiss, M. Marciuš, M. Ristić, M. Ivanda, and N.S. Sariciftci, Applied Physics Letters, 107 (2015) 083302
NIR; optoelectronics; hybrid junction; organic semiconductor; silicon
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Podaci o prilogu
34-x.
2016.
objavljeno
Podaci o matičnoj publikaciji
16th Joint Vacuum Conference (JVC-16) 14th European Vacuum Conference (EVC-14) 23rd Croatian-Slovenian Vacuum Meeting PROGRAMME AND BOOK OF ABSTRACTS
Janez Kovač, Gregor Jakša
Ljubljana: Slovenian Society for Vacuum Technique (DVTS)
978-961-92989-8-5
Podaci o skupu
16th Joint Vacuum Conference (JVC-16), the 14th European Vacuum Conference (EVC-14) and the 23th Croatian Slovenian International Scientific Meeting on Vacuum Science and Technique
predavanje
06.06.2016-10.06.2016
Portorož, Slovenija