Improved luminescence performance of Yb3+-Er3+-Zn2+: Y2O3 phosphor and its application to solar cells

Fadzai Lesley Chawarambwa; Tika Erna Putri; Sung Hwa Hwang; Pankaj Attri; Kunihiro Kamataki; Naho Itagaki; Kazunori Koga; Daisuke Nakamura; Masaharu Shiratani

doi:10.1016/j.optmat.2021.111928

Improved luminescence performance of Yb³⁺-Er³⁺-Zn²⁺: Y₂O₃ phosphor and its application to solar cells

Fadzai Lesley Chawarambwa, Tika Erna Putri, Sung Hwa Hwang, Pankaj Attri, Kunihiro Kamataki, Naho Itagaki, Kazunori Koga, Daisuke Nakamura, Masaharu Shiratani

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Upconversion materials (UC) can convert low-energy photons into visible light and, therefore, can be incorporated in solar cells to increase the absorption of visible light. This study synthesized UC nanophosphors Yb³⁺, Er³⁺: Y₂O₃ and Yb³⁺, Er³⁺, Zn²⁺: Y₂O₃ by a simple co-precipitation method for application in dye-sensitized solar cells (DSSCs). The impact of the enhancement in the concentration of Zn²⁺ on the photoluminescence (PL) and color point of the synthesized nanophosphors was also investigated. The synthesized nanophosphors emitted intense red and weaker green emissions upon excitation at 980 nm. The incorporation of Zn²⁺ to the Yb³⁺, Er³⁺: Y₂O₃ nanophosphors leads to color tunability in the red and yellow regions. Furthermore, the synthesized nanophosphors were incorporated into the DSSC photoanode to form a TiO₂-UC-based DSSC for converting near-infrared (NIR) into visible light. We observed that the TiO₂-UC-based DSSC showed an enhancement ratio in current density and power conversion efficiency of 17.4% and 16.6%, respectively, compared to the bare TiO₂-based DSSC. These results reveal that UC-based Yb³⁺, Er³⁺, Zn²⁺: Y₂O₃ nanophosphors are useful in improving the efficiency of DSSCs and in color tunability applications.

Original language	English
Article number	111928
Journal	Optical Materials
Volume	123
DOIs	https://doi.org/10.1016/j.optmat.2021.111928
Publication status	Published - Jan 2022

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/j.optmat.2021.111928

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title = "Improved luminescence performance of Yb3+-Er3+-Zn2+: Y2O3 phosphor and its application to solar cells",

abstract = "Upconversion materials (UC) can convert low-energy photons into visible light and, therefore, can be incorporated in solar cells to increase the absorption of visible light. This study synthesized UC nanophosphors Yb3+, Er3+: Y2O3 and Yb3+, Er3+, Zn2+: Y2O3 by a simple co-precipitation method for application in dye-sensitized solar cells (DSSCs). The impact of the enhancement in the concentration of Zn2+ on the photoluminescence (PL) and color point of the synthesized nanophosphors was also investigated. The synthesized nanophosphors emitted intense red and weaker green emissions upon excitation at 980 nm. The incorporation of Zn2+ to the Yb3+, Er3+: Y2O3 nanophosphors leads to color tunability in the red and yellow regions. Furthermore, the synthesized nanophosphors were incorporated into the DSSC photoanode to form a TiO2-UC-based DSSC for converting near-infrared (NIR) into visible light. We observed that the TiO2-UC-based DSSC showed an enhancement ratio in current density and power conversion efficiency of 17.4% and 16.6%, respectively, compared to the bare TiO2-based DSSC. These results reveal that UC-based Yb3+, Er3+, Zn2+: Y2O3 nanophosphors are useful in improving the efficiency of DSSCs and in color tunability applications.",

author = "Chawarambwa, {Fadzai Lesley} and Putri, {Tika Erna} and Hwang, {Sung Hwa} and Pankaj Attri and Kunihiro Kamataki and Naho Itagaki and Kazunori Koga and Daisuke Nakamura and Masaharu Shiratani",

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year = "2022",

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doi = "10.1016/j.optmat.2021.111928",

language = "English",

volume = "123",

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T1 - Improved luminescence performance of Yb3+-Er3+-Zn2+

T2 - Y2O3 phosphor and its application to solar cells

AU - Chawarambwa, Fadzai Lesley

AU - Putri, Tika Erna

AU - Hwang, Sung Hwa

AU - Attri, Pankaj

AU - Kamataki, Kunihiro

AU - Itagaki, Naho

AU - Koga, Kazunori

AU - Nakamura, Daisuke

AU - Shiratani, Masaharu

PY - 2022/1

Y1 - 2022/1

N2 - Upconversion materials (UC) can convert low-energy photons into visible light and, therefore, can be incorporated in solar cells to increase the absorption of visible light. This study synthesized UC nanophosphors Yb3+, Er3+: Y2O3 and Yb3+, Er3+, Zn2+: Y2O3 by a simple co-precipitation method for application in dye-sensitized solar cells (DSSCs). The impact of the enhancement in the concentration of Zn2+ on the photoluminescence (PL) and color point of the synthesized nanophosphors was also investigated. The synthesized nanophosphors emitted intense red and weaker green emissions upon excitation at 980 nm. The incorporation of Zn2+ to the Yb3+, Er3+: Y2O3 nanophosphors leads to color tunability in the red and yellow regions. Furthermore, the synthesized nanophosphors were incorporated into the DSSC photoanode to form a TiO2-UC-based DSSC for converting near-infrared (NIR) into visible light. We observed that the TiO2-UC-based DSSC showed an enhancement ratio in current density and power conversion efficiency of 17.4% and 16.6%, respectively, compared to the bare TiO2-based DSSC. These results reveal that UC-based Yb3+, Er3+, Zn2+: Y2O3 nanophosphors are useful in improving the efficiency of DSSCs and in color tunability applications.

AB - Upconversion materials (UC) can convert low-energy photons into visible light and, therefore, can be incorporated in solar cells to increase the absorption of visible light. This study synthesized UC nanophosphors Yb3+, Er3+: Y2O3 and Yb3+, Er3+, Zn2+: Y2O3 by a simple co-precipitation method for application in dye-sensitized solar cells (DSSCs). The impact of the enhancement in the concentration of Zn2+ on the photoluminescence (PL) and color point of the synthesized nanophosphors was also investigated. The synthesized nanophosphors emitted intense red and weaker green emissions upon excitation at 980 nm. The incorporation of Zn2+ to the Yb3+, Er3+: Y2O3 nanophosphors leads to color tunability in the red and yellow regions. Furthermore, the synthesized nanophosphors were incorporated into the DSSC photoanode to form a TiO2-UC-based DSSC for converting near-infrared (NIR) into visible light. We observed that the TiO2-UC-based DSSC showed an enhancement ratio in current density and power conversion efficiency of 17.4% and 16.6%, respectively, compared to the bare TiO2-based DSSC. These results reveal that UC-based Yb3+, Er3+, Zn2+: Y2O3 nanophosphors are useful in improving the efficiency of DSSCs and in color tunability applications.

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Improved luminescence performance of Yb³⁺-Er³⁺-Zn²⁺: Y₂O₃ phosphor and its application to solar cells

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