Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules

Li Jung Kuo; Li Yu Li; Yu Chun Chang; Tong Ke Lin; Han Chen Chang; Yu Chiao Shieh; Shih Wei Chen; Jia Min Shieh; Li Yin Chen; Peichen Yu; Yu Chiang Chao; Hsin Fei Meng

doi:10.1007/s11664-023-10233-z

Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules

Li Jung Kuo, Li Yu Li, Yu Chun Chang, Tong Ke Lin, Han Chen Chang, Yu Chiao Shieh, Shih Wei Chen, Jia Min Shieh, Li Yin Chen, Peichen Yu^*, Yu Chiang Chao^*, Hsin Fei Meng^*

^*Corresponding author for this work

Department of Physics

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

2 Citations (Scopus)

Abstract

We report an organic luminescent small molecule, Bis(1-phenylisoquinoline) (acetylacetonate) iridium(III) or Ir(piq)₂(acac), that can function as a stable and efficient hole selective contact (HSC) for crystalline silicon (c-Si) solar cells. The devices with the Ir(piq)₂(acac) HSC exhibit superior charge transport properties and high stability for up to 30 days in the air without packaging. The photovoltaic characteristics with the solution-processed Ir(piq)₂(acac) HSC exhibit little dependence on the blade coating speed and film thickness, demonstrating tolerance to coating and thickness variations. Moreover, the series resistance of the solar cells and the surface work function of the Ir(piq)₂(acac) HSCs exhibit analogous correlations to the annealing temperature, suggesting that the fill factor (FF) enhancement originates from an upward energy band bending and a reduced barrier height which facilitates hole transport and collection. The conventional c-Si solar cell incorporating an Ir(piq)₂(acac) HSC achieves a 17.8% power conversion efficiency (PCE) with a 78.9% FF, both exceeding the reference counterpart with a 16.9% PCE and 76.8% FF. This work opens up possibilities for exploring a variety of organic luminescent small molecules as efficient hole selective contacts in high-efficiency and low-cost silicon photovoltaics. Graphic Abstract: [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	2708-2717
Number of pages	10
Journal	Journal of Electronic Materials
Volume	52
Issue number	4
DOIs	https://doi.org/10.1007/s11664-023-10233-z
Publication status	Published - 2023 Apr

Keywords

Carrier selective contacts
luminescent small molecules
organic silicon interface
silicon solar cells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s11664-023-10233-z

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Kuo, L. J., Li, L. Y., Chang, Y. C., Lin, T. K., Chang, H. C., Shieh, Y. C., Chen, S. W., Shieh, J. M., Chen, L. Y., Yu, P., Chao, Y. C., & Meng, H. F. (2023). Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules. Journal of Electronic Materials, 52(4), 2708-2717. https://doi.org/10.1007/s11664-023-10233-z

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title = "Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules",

abstract = "We report an organic luminescent small molecule, Bis(1-phenylisoquinoline) (acetylacetonate) iridium(III) or Ir(piq)2(acac), that can function as a stable and efficient hole selective contact (HSC) for crystalline silicon (c-Si) solar cells. The devices with the Ir(piq)2(acac) HSC exhibit superior charge transport properties and high stability for up to 30 days in the air without packaging. The photovoltaic characteristics with the solution-processed Ir(piq)2(acac) HSC exhibit little dependence on the blade coating speed and film thickness, demonstrating tolerance to coating and thickness variations. Moreover, the series resistance of the solar cells and the surface work function of the Ir(piq)2(acac) HSCs exhibit analogous correlations to the annealing temperature, suggesting that the fill factor (FF) enhancement originates from an upward energy band bending and a reduced barrier height which facilitates hole transport and collection. The conventional c-Si solar cell incorporating an Ir(piq)2(acac) HSC achieves a 17.8% power conversion efficiency (PCE) with a 78.9% FF, both exceeding the reference counterpart with a 16.9% PCE and 76.8% FF. This work opens up possibilities for exploring a variety of organic luminescent small molecules as efficient hole selective contacts in high-efficiency and low-cost silicon photovoltaics. Graphic Abstract: [Figure not available: see fulltext.].",

keywords = "Carrier selective contacts, luminescent small molecules, organic silicon interface, silicon solar cells",

author = "Kuo, {Li Jung} and Li, {Li Yu} and Chang, {Yu Chun} and Lin, {Tong Ke} and Chang, {Han Chen} and Shieh, {Yu Chiao} and Chen, {Shih Wei} and Shieh, {Jia Min} and Chen, {Li Yin} and Peichen Yu and Chao, {Yu Chiang} and Meng, {Hsin Fei}",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

month = apr,

doi = "10.1007/s11664-023-10233-z",

language = "English",

volume = "52",

pages = "2708--2717",

journal = "Journal of Electronic Materials",

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TY - JOUR

T1 - Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules

AU - Kuo, Li Jung

AU - Li, Li Yu

AU - Chang, Yu Chun

AU - Lin, Tong Ke

AU - Chang, Han Chen

AU - Shieh, Yu Chiao

AU - Chen, Shih Wei

AU - Shieh, Jia Min

AU - Chen, Li Yin

AU - Yu, Peichen

AU - Chao, Yu Chiang

AU - Meng, Hsin Fei

PY - 2023/4

Y1 - 2023/4

N2 - We report an organic luminescent small molecule, Bis(1-phenylisoquinoline) (acetylacetonate) iridium(III) or Ir(piq)2(acac), that can function as a stable and efficient hole selective contact (HSC) for crystalline silicon (c-Si) solar cells. The devices with the Ir(piq)2(acac) HSC exhibit superior charge transport properties and high stability for up to 30 days in the air without packaging. The photovoltaic characteristics with the solution-processed Ir(piq)2(acac) HSC exhibit little dependence on the blade coating speed and film thickness, demonstrating tolerance to coating and thickness variations. Moreover, the series resistance of the solar cells and the surface work function of the Ir(piq)2(acac) HSCs exhibit analogous correlations to the annealing temperature, suggesting that the fill factor (FF) enhancement originates from an upward energy band bending and a reduced barrier height which facilitates hole transport and collection. The conventional c-Si solar cell incorporating an Ir(piq)2(acac) HSC achieves a 17.8% power conversion efficiency (PCE) with a 78.9% FF, both exceeding the reference counterpart with a 16.9% PCE and 76.8% FF. This work opens up possibilities for exploring a variety of organic luminescent small molecules as efficient hole selective contacts in high-efficiency and low-cost silicon photovoltaics. Graphic Abstract: [Figure not available: see fulltext.].

AB - We report an organic luminescent small molecule, Bis(1-phenylisoquinoline) (acetylacetonate) iridium(III) or Ir(piq)2(acac), that can function as a stable and efficient hole selective contact (HSC) for crystalline silicon (c-Si) solar cells. The devices with the Ir(piq)2(acac) HSC exhibit superior charge transport properties and high stability for up to 30 days in the air without packaging. The photovoltaic characteristics with the solution-processed Ir(piq)2(acac) HSC exhibit little dependence on the blade coating speed and film thickness, demonstrating tolerance to coating and thickness variations. Moreover, the series resistance of the solar cells and the surface work function of the Ir(piq)2(acac) HSCs exhibit analogous correlations to the annealing temperature, suggesting that the fill factor (FF) enhancement originates from an upward energy band bending and a reduced barrier height which facilitates hole transport and collection. The conventional c-Si solar cell incorporating an Ir(piq)2(acac) HSC achieves a 17.8% power conversion efficiency (PCE) with a 78.9% FF, both exceeding the reference counterpart with a 16.9% PCE and 76.8% FF. This work opens up possibilities for exploring a variety of organic luminescent small molecules as efficient hole selective contacts in high-efficiency and low-cost silicon photovoltaics. Graphic Abstract: [Figure not available: see fulltext.].

KW - Carrier selective contacts

KW - luminescent small molecules

KW - organic silicon interface

KW - silicon solar cells

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U2 - 10.1007/s11664-023-10233-z

DO - 10.1007/s11664-023-10233-z

M3 - Article

AN - SCOPUS:85146766759

SN - 0361-5235

VL - 52

SP - 2708

EP - 2717

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

IS - 4

ER -

Stable and Efficient Hole Selective Contacts for Silicon Photovoltaics via Solution-Processed Luminescent Small Molecules

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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