Journal: ACS Applied Optical Materials

Abbreviation

ACS Appl. Opt. Mater.

Publisher

American Chemical Society

Journal Volumes

ISSN

2771-9855

Description

Filters

2024 - 20252
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Publications 1 - 2 of 2
  • Single-Layered Luminescent Solar Concentrators via Configurational Design Based on Perylene Diimide Derivatives
    Item type: Journal Article
    Li , Sha; Ye , Suiying; Lo , Shao-Wei; et al. (2025)
    ACS Applied Optical Materials
    A luminescent solar concentrator (LSC) is a promising photonic device for sunlight harvesting, but its potential for commercialization is limited by ηext, requiring design innovation in material and configuration. While most research has been focused on developing luminophores, very limited efforts are made to compare the performance of different LSC configurations. Herein, the performance of two LSC configurations─thin-film coated and bulk doped─is investigated in order to demonstrate efficient single-layered LSCs. The luminophores of interest are two perylene diimide (PDI) derivatives, given their distinct effective photoluminescence quantum yield (PLQYeff) and Stokes shifts: the commercial Lumogen F Red 305 (LFR305) and our four-arm PDI-based styrenic polymer (PDI-tetraPS). Overall, doped LSCs are more efficient than coated configurations, thanks to the high PLQYeffand strong absorbance achieved simultaneously that significantly reduce the transmission and QY losses, leading to an external photon efficiency of 8.1% and power conversion efficiency of 2.1% (for the LFR305 doped case). For the coated LSCs, a thicker lightguide leads to a higher ηextby mitigating the reabsorption loss, yielding an external photon efficiency of 2.1% (for the PDI-tetraPS coated case). The choice of the optimal luminophore strongly depends on the LSC configuration, and its concentration proves to be a critical optimization factor, revealing an inevitable trade-off between transmission and QY losses. Future efforts on performant LSCs can be focused on multilayered configurations via optimal integration of more promising luminophores and lightguides that emerged recently.
  • Antimony-Doped Tin Oxide Hole Injection Interlayer Improving the Efficiency of Perovskite Nanocrystal Light Emitting Diodes
    Item type: Journal Article
    Ioakeimidis, Apostolos; Galatopoulos, Fedros; Athanasiou, Modestos; et al. (2024)
    ACS Applied Optical Materials
    We present significant performance enhancement of CsPbBr₃ perovskite nanocrystal (NC) light emitting diodes (PNC LEDs) by incorporation of a solution processed doped metal oxide hole injection interlayer consisting of 10 atom % doped antimony tin oxide (ATO) within the PNC LEDs device architecture. The incorporation of an ATO interlayer between ITO and poly-TPD improves the bottom electrode hole injection properties and provides charge balanced PNC LEDs that show three and half times increased luminance, lower turn-on voltage, and improved maximum current and power efficiency compared to reference CsPbBr₃ PNC LEDs incorporating the commonly used PEDOT:PSS hole injection interlayer.
Publications 1 - 2 of 2