Stokes-shift-engineered indium phosphide quantum dots for efficient luminescent solar concentrators

Sadeghi, Sadra and Bahmani Jalali, Houman and Melikov, Rustamzhon and Kumar, Baskaran Ganesh and Mohammadi Aria, Mohammad and Ow-Yang, Cleva W. and Nizamoğlu, Sedat (2018) Stokes-shift-engineered indium phosphide quantum dots for efficient luminescent solar concentrators. ACS Applied Materials & Interfaces, 10 (15). pp. 12975-12982. ISSN 1944-8244 (Print) 1944-8252 (Online)

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Luminescent solar concentrators (LSCs) show promise because of their potential for low-cost, large-area, and high-efficiency energy harvesting. Stokes shift engineering of luminescent quantum dots (QDs) is a favorable approach to suppress reabsorption losses in LSCs; however, the use of highly toxic heavy metals in QDs constitutes a serious concern for environmental sustainability. Here, we report LSCs based on cadmium-free InP/ZnO core/shell QDs with type-II band alignment that allow for the suppression of reabsorption by Stokes shift engineering. The spectral emission and absorption overlap was controlled by the growth of a ZnO shell on an InP core. At the same time, the ZnO layer also facilitates the photostability of the QDs within the host matrix. We analyzed the optical performance of indium-based LSCs and identified the optical efficiency as 1.45%. The transparency, flexibility, and cadmium-free content of the LSCs hold promise for solar window applications.
Item Type: Article
Uncontrolled Keywords: Stokes shift; quantum dots; luminescent solar concentrator; reabsorption; type-II; band alignment; solar cell; indium phosphide (InP)
Subjects: T Technology > T Technology (General)
Q Science > QD Chemistry
Q Science > QC Physics
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Cleva W. Ow-Yang
Date Deposited: 08 Aug 2018 22:10
Last Modified: 25 May 2023 14:04

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