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. 2021 May 16;21(10):3467. doi: 10.3390/s21103467

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Photoelectric compound (PEC) measurements at planar and scaffolded-wrinkled photoelectrodes. (a) Visible light (470 nm) induces electron/hole pairs in CdTe quantum dots (QDs). Holes oxidize ascorbic acid, generating an anodic redox current. (b) PEC current densities measured on planar (left) and scaffolded-wrinkled (right) devices using 100 mM ascorbic acid at 0 V with respect to Ag/AgCl. The QD layers are increased by depositing alternate layers of QDs and poly (diallyl dimethylammonium chloride) (PDDA). The 470 nm light-emitting diode is turned on at 3 s and turned off at 23 s. (c) The average PEC current densities measured on planar (left) and scaffolded-wrinkled (right) devices for different numbers of QD layers. (d) Scanning transmission electron micrographs of cross-sections of planar (left) and scaffolded-wrinkled (right) devices. The imaged devices contain three QD layers Reprinted with permission from ref. [20]. 2018 American Chemistry Society.