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Enhanced performance of CdS/CdSe quantum dot-sensitized solar cells by long-persistence phosphors structural layer

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  • ReceivedOct 31, 2019
  • AcceptedJan 7, 2020
  • PublishedJan 20, 2020

Abstract


Funding

the National Natural Science Foundation of China(61376011,51402141,61604086)

the Natural Science Foundation of Gansu Province(17JR5RA198)

the Fundamental Research Funds for the Central Universities(LZUJBKY-2018-119,LZUJBKY-2018-CT08)

and Shenzhen Science and Technology Innovation Committee(JCYJ20170818155813437)

the Key Areas Scientific and Technological Research Projects in Xinjiang Production and Construction Corps(2018AB004)


Acknowledgment

This work was financially supported by the National Natural Science Foundation of China (61376011, 51402141 and 61604086), Gansu Provincial Natural Science Foundation (17JR5RA198), the Fundamental Research Funds for the Central Universities (LZUJBKY-2018-119 and LZUJBKY-2018-CT08), Shenzhen Science and Technology Innovation Committee (JCYJ201708181558- 13437), and the Key Areas Scientific and Technological Research Projects in Xinjiang Production and Construction Corps (2018AB004).


Interest statement

The authors declare no conflict of interest.


Contributions statement

Deng Y and Lu S designed and engineered the samples; Deng Y performed the experiments and data analysis; Deng Y wrote the paper with support from Ma F and Peng S; Deng Y, Ma F and Peng S contributed to the theoretical analysis. Zhang J provided the experimental materials and contributed to the theoretical analysis.


Author information

Yunlong Deng was awarded a bachelor's degree by Shenyang University of Science and Technology in 2017. He is currently a graduate student in the School of Materials Science and Engineering at Lanzhou University. His main research interests are nanostructure design of quantum dot solar cells and flexible all-solid-state devices.


Shanglong Peng is a Professor of Lanzhou University. Since 2010, he has worked at the University of Washington, Seoul National University and the Hong Kong University of Science and Technology. Currently, he is mainly engaged in the design of nanomaterials, interface regulation and their applications in energy conversion and storage, including supercapacitors, solar cells and flexible wearable integrated energy conversion and storage integrated devices.


Supplementary data

Supplementary information

Supporting data are available in the online version of the paper.


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  • Figure 1

    Schematic configuration of the QDSSCs (a) without and (b) with LPPs. The corresponding optical images of the photoanodes (c) in light and (d) in the dark.

  • Figure 2

    Top-view SEM images of (a) TiO2/QDs and (b) TiO2/QDs/olivine-emitting LPP photoanodes. Cross-sectional SEM images of (c) TiO2/QDs/olivine-emitting LPP photoanode and (d) partial enlargement.

  • Figure 3

    (a) Transmission and (b) UV-Vis absorption spectra of the photoanodes using FTO glass as benchmarks.

  • Figure 4

    (a) Photoluminescence spectra of the olivine-emitting LPPs are obtained at room temperature. (b) IPCE spectra of QDSSCs, (c) current density–voltage (J-V) curves and (d) EIS spectra.

  • Figure 5

    (a) Current density-voltage (J-V) characteristics of the QDSSCs. (b) The dependence of the average PCE and Jsc on the kinds of LPPs in the modified photoanode and (c) light path diagram of the photoanodes with LPP layer.

  • Table 1   Photoelectric parameters corresponding to different photoanodes in the device

    Sample

    Voc (V)

    Jsc(mA cm−2)

    FF

    η (%)

    TiO2/QDs/Olivine

    0.59

    15.36

    0.56

    5.07

    TiO2/QDs/Blue

    0.59

    14.35

    0.57

    4.82

    TiO2/QDs/Red

    0.59

    13.80

    0.56

    4.58

    TiO2/QDs

    0.58

    12.89

    0.55

    4.08

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