Figure 6: Temperature and time dependence of the photocurrent.
From: Broadband high photoresponse from pure monolayer graphene photodetector
(a) the I–V curves of Sample C with and without 532 nm illuminations. A high photoresponsivity of 8.61 AW-1 is achieved at a VD voltage of 0.1 V. (b) Time-dependent photocurrent measurements at different temperatures under the visible light illumination. (c) Temperature dependence of the photocurrent of Sample C. The photoresponse decreases with the temperature, shown in b and c, resulting from a faster recombination of captured electrons in the MGB at a higher temperature, thus the lifetime of these trapped electrons is reduced.
