Visible Light Photodiodes and Photovoltages from Detonation Nanodiamonds. Issue 14 (2016)

• Record Type: Journal Article
• Authors: Rezek, Bohuslav; Stehlik, Stepan; Kromka, Alexander; Arnault, Jean-Charles; Weis, Martin; Jakabovic, Jan
• Is Part Of: MRS advances. Volume 1:Issue 14(2016)
• Page Start: 971
• Page End: 975
• Publication Date: 2016
• Subjects: diamond, -- nanostructure, -- photovoltaic; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2016.115
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: 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.