Highly efficient solid-state mesoscopic PbS with embedded CuS quantum dot-sensitized solar cells

Joong Pill Park; Jin Hyuck Heo; Sang Hyuk Im; Sang Wook Kim

doi:10.1039/c5ta08668j

Highly efficient solid-state mesoscopic PbS with embedded CuS quantum dot-sensitized solar cells

Joong Pill Park, Jin Hyuck Heo, Sang Hyuk Im, Sang Wook Kim

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

37 Citations (Scopus)

Abstract

We synthesized a new type of PbS colloidal quantum dot (QDs) embedding CuS (PbS[CuS] QDs) by rapid injection of a sulfur precursor into a lead precursor solution followed by cation exchange of Pb with Cu ions. By the cation exchange reaction, the edge of PbS QDs was partially converted into CuS, which enhances the absorptivity of light and creates an additional absorption band in the near infrared (NIR) region due to the surface plasmon resonance (SPR) effect by the existence of vacancies in CuS. From the transient and static photoluminescence (PL) decay measurements, we found that the PL decay time of PbS[CuS] QDs was ∼2 fold longer than that of the PbS QDs and the PbS[CuS] QDs showed great PL quenching compared to the PbS QDs. Accordingly, the generated excitons in PbS/CuS QDs are more easily dissociated into free charge carriers than those in the PbS QDs. As a result, the mesoscopic PbS/CuS QD-sensitized solar cells constructed using FTO (F-doped SnO₂)/bl-TiO₂ (blocking TiO₂)/mesoscopic TiO₂/PbS/CuS CQDs/P3HT (poly-3-hexylthiophene)/Au showed 0.6 V open-circuit voltage (V_oc), 20.7 mA cm^-2 short-circuit current density (J_sc), 65% fill factor (FF), and 8.07% overall power conversion efficiency under 1 sun conditions (100 mW cm^-2 AM 1.5G) due to the improved absorptivity and the reduced recombination of charge carriers.

Original language	English
Pages (from-to)	785-790
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	4
Issue number	3
DOIs	https://doi.org/10.1039/c5ta08668j
Publication status	Published - 2016
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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

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10.1039/c5ta08668j

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@article{c60ed4709aff4d48b035bf0479465eeb,

title = "Highly efficient solid-state mesoscopic PbS with embedded CuS quantum dot-sensitized solar cells",

abstract = "We synthesized a new type of PbS colloidal quantum dot (QDs) embedding CuS (PbS[CuS] QDs) by rapid injection of a sulfur precursor into a lead precursor solution followed by cation exchange of Pb with Cu ions. By the cation exchange reaction, the edge of PbS QDs was partially converted into CuS, which enhances the absorptivity of light and creates an additional absorption band in the near infrared (NIR) region due to the surface plasmon resonance (SPR) effect by the existence of vacancies in CuS. From the transient and static photoluminescence (PL) decay measurements, we found that the PL decay time of PbS[CuS] QDs was ∼2 fold longer than that of the PbS QDs and the PbS[CuS] QDs showed great PL quenching compared to the PbS QDs. Accordingly, the generated excitons in PbS/CuS QDs are more easily dissociated into free charge carriers than those in the PbS QDs. As a result, the mesoscopic PbS/CuS QD-sensitized solar cells constructed using FTO (F-doped SnO2)/bl-TiO2 (blocking TiO2)/mesoscopic TiO2/PbS/CuS CQDs/P3HT (poly-3-hexylthiophene)/Au showed 0.6 V open-circuit voltage (Voc), 20.7 mA cm-2 short-circuit current density (Jsc), 65% fill factor (FF), and 8.07% overall power conversion efficiency under 1 sun conditions (100 mW cm-2 AM 1.5G) due to the improved absorptivity and the reduced recombination of charge carriers.",

author = "Park, {Joong Pill} and Heo, {Jin Hyuck} and Im, {Sang Hyuk} and Kim, {Sang Wook}",

note = "Funding Information: This work was supported by the New & Renewable Energy Core Technology Program of Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 201330300001) and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799), Republic of Korea. Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/c5ta08668j",

language = "English",

volume = "4",

pages = "785--790",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

number = "3",

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TY - JOUR

T1 - Highly efficient solid-state mesoscopic PbS with embedded CuS quantum dot-sensitized solar cells

AU - Park, Joong Pill

AU - Heo, Jin Hyuck

AU - Im, Sang Hyuk

AU - Kim, Sang Wook

N1 - Funding Information: This work was supported by the New & Renewable Energy Core Technology Program of Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 201330300001) and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799), Republic of Korea. Publisher Copyright: © 2016 The Royal Society of Chemistry.

PY - 2016

Y1 - 2016

N2 - We synthesized a new type of PbS colloidal quantum dot (QDs) embedding CuS (PbS[CuS] QDs) by rapid injection of a sulfur precursor into a lead precursor solution followed by cation exchange of Pb with Cu ions. By the cation exchange reaction, the edge of PbS QDs was partially converted into CuS, which enhances the absorptivity of light and creates an additional absorption band in the near infrared (NIR) region due to the surface plasmon resonance (SPR) effect by the existence of vacancies in CuS. From the transient and static photoluminescence (PL) decay measurements, we found that the PL decay time of PbS[CuS] QDs was ∼2 fold longer than that of the PbS QDs and the PbS[CuS] QDs showed great PL quenching compared to the PbS QDs. Accordingly, the generated excitons in PbS/CuS QDs are more easily dissociated into free charge carriers than those in the PbS QDs. As a result, the mesoscopic PbS/CuS QD-sensitized solar cells constructed using FTO (F-doped SnO2)/bl-TiO2 (blocking TiO2)/mesoscopic TiO2/PbS/CuS CQDs/P3HT (poly-3-hexylthiophene)/Au showed 0.6 V open-circuit voltage (Voc), 20.7 mA cm-2 short-circuit current density (Jsc), 65% fill factor (FF), and 8.07% overall power conversion efficiency under 1 sun conditions (100 mW cm-2 AM 1.5G) due to the improved absorptivity and the reduced recombination of charge carriers.

AB - We synthesized a new type of PbS colloidal quantum dot (QDs) embedding CuS (PbS[CuS] QDs) by rapid injection of a sulfur precursor into a lead precursor solution followed by cation exchange of Pb with Cu ions. By the cation exchange reaction, the edge of PbS QDs was partially converted into CuS, which enhances the absorptivity of light and creates an additional absorption band in the near infrared (NIR) region due to the surface plasmon resonance (SPR) effect by the existence of vacancies in CuS. From the transient and static photoluminescence (PL) decay measurements, we found that the PL decay time of PbS[CuS] QDs was ∼2 fold longer than that of the PbS QDs and the PbS[CuS] QDs showed great PL quenching compared to the PbS QDs. Accordingly, the generated excitons in PbS/CuS QDs are more easily dissociated into free charge carriers than those in the PbS QDs. As a result, the mesoscopic PbS/CuS QD-sensitized solar cells constructed using FTO (F-doped SnO2)/bl-TiO2 (blocking TiO2)/mesoscopic TiO2/PbS/CuS CQDs/P3HT (poly-3-hexylthiophene)/Au showed 0.6 V open-circuit voltage (Voc), 20.7 mA cm-2 short-circuit current density (Jsc), 65% fill factor (FF), and 8.07% overall power conversion efficiency under 1 sun conditions (100 mW cm-2 AM 1.5G) due to the improved absorptivity and the reduced recombination of charge carriers.

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U2 - 10.1039/c5ta08668j

DO - 10.1039/c5ta08668j

M3 - Article

AN - SCOPUS:84953439991

SN - 2050-7488

VL - 4

SP - 785

EP - 790

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 3

ER -

Highly efficient solid-state mesoscopic PbS with embedded CuS quantum dot-sensitized solar cells

Abstract

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