Visible light photodiodes and photovoltages from detonation nanodiamonds

0470562 - FZÚ 2017 RIV GB eng J - Journal Article
Rezek, Bohuslav - Stehlík, Štěpán - Kromka, Alexander - Arnault, J.-C. - Weis, M. - Jakabovič, J.
Visible light photodiodes and photovoltages from detonation nanodiamonds.
MRS Advances. Roč. 1, č. 14 (2016), s. 971-975. ISSN 2059-8521
R&D Projects: GA ČR GA15-01809S
Institutional support: RVO:68378271
Keywords : nanodiamond * photodiode
Subject RIV: BM - Solid Matter Physics ; Magnetism

Macroscopic and microscopic photovoltage characteristics of detonation nanodiamonds(DNDs) with distinct surface terminations are presented. Organic photodiodes are fabricated based on P3HT+DNDs mixture (50 wt%). We compare effect of hydrogen and oxygen termination of DNDs. Compared to photodiodes without DNDs the current-voltage characteristics of photodiodes with O-DNDs in dark and under AM 1.5 illumination show
reduced dark current, and higher photocurrent and open circuit voltage. H-DNDs shunt the photodiodes, which is attributed to their surface conductivity. Kelvin probe force microscopy detects a reproducible photovoltage of around 5 mV generated by a green laser (532 nm) on both
types of pristine DNDs. Thus although conductivity of H-DNDs may represent a problem for photodiodes, both types of DNDs alone can function as miniature energy conversion devices.
Permanent Link: http://hdl.handle.net/11104/0268166