Nanda, Sitansu Sekhar Kim, Minjik Yoo, Sung Jong Papaefthymiou, Georgia C. Yi, Dong Kee 2024-01-19T17:00:23Z 2024-01-19T17:00:23Z 2021-09-02 2020-09 2072-666X https://pubs.kist.re.kr/handle/201004/118219 Monolayer nanocrystal-based light sensors with cadmium-selenium thin film electrodes have been investigated using electrochemical cyclic voltammetry tests. An indium tin oxide electrode system, with a monolayer of homogeneously deposited cadmium-selenium quantum dots was proven to work as a photo-sensor via an electrochemical cell mechanism; it was possible to tune current densities under light illumination. Electrochemical tests on a quantum dot capacitor, using different sized (red, yellow and green) cadmium-selenium quantum dots on indium tin oxide substrates, showed typical capacitive behavior of cyclic voltammetry curves in 2M H2SO4 aqueous solutions. This arrangement provides a beneficial effect in, both, charge separation and light sensory characteristics. Importantly, the photocurrent density depended on quantum yield rendering tunable photo-sensing properties. English MDPI Monolayer Quantum-Dot Based Light-Sensor by a Photo-Electrochemical Mechanism Article 10.3390/mi11090817 1 MICROMACHINES, v.11, no.9 MICROMACHINES 11 9 scie scopus 000581464600001 2-s2.0-85092354001 Chemistry, Analytical Nanoscience & Nanotechnology Instruments & Instrumentation Physics, Applied Chemistry Science & Technology - Other Topics Instruments & Instrumentation Physics Article CdSe quantum dots capacitor semiconductor electrode photo-sensor