Naslov
Nanostructured Silicon Heterojunctions for NIR Optoelectronics

Autori
Đerek, Vedran ; Glowacki, Eric Daniel ; Sariciftci, Niyazi Serdar ; Ivanda, Mile

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
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), 2016

ISBN
978-961-92989-8-5

Skup
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

Mjesto i datum
Portorož, Slovenija, 06.06.2016. - 10.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NIR; optoelectronics; hybrid junction; organic semiconductor; silicon

Sažetak
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

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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