New iridium(III) cyclometalates with extended absorption features for bulk heterojunction solar cells

Guiping Tan; Peng Liu; Hao Wu; Sze Chun Yiu; Fengrong Dai; Ying Hsuan Feng; Xiaotian Liu; Yongfu Qiu; Yih Hsing Lo; Cheuk Lam Ho; Wai Yeung Wong

doi:10.1016/j.jorganchem.2016.03.003

New iridium(III) cyclometalates with extended absorption features for bulk heterojunction solar cells

Guiping Tan
, Peng Liu
, Hao Wu
, Sze Chun Yiu
, Fengrong Dai
, Ying Hsuan Feng
, Xiaotian Liu
, Yongfu Qiu^*
, Yih Hsing Lo
, Cheuk Lam Ho
, Wai Yeung Wong

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

13 Citations (Scopus)

Abstract

Two new iridium(III) cyclometalates (A and B) based on 2-[5-(9,9′-diethyl-9H-fluoren-7-yl)thienyl]-pyridine were synthesized, characterized and applied in bulk-heterojunction solar cells (BHJSCs). Their absorption, electrochemical, thermal and photovoltaic properties have been investigated. The results reveal that the replacement of phenyl ring by thienyl one can extend the absorption wavelength up to 530 nm, thus narrowing the energy gap (E_g) to 2.93 eV and 2.81 eV for A and B, respectively. These complexes exhibit excellent thermal stability with the onset decomposition temperature at 5% weight-loss (T_d) of over 370 °C. The BHJSC device with A as donor blended with [6,6]-phenyl C₆₁-butyric acid methyl ester (PCBM) gave the best power conversion efficiency (η) of 0.51%, with a short-circuit photocurrent density (J_sc) of 2.68 mA cm^-2, an open-circuit photovoltage (V_oc) of 0.66 V and a fill factor (ff) of 0.28 under illumination of an AM 1.5 solar cell simulator.

Original language	English
Pages (from-to)	280-286
Number of pages	7
Journal	Journal of Organometallic Chemistry
Volume	812
DOIs	https://doi.org/10.1016/j.jorganchem.2016.03.003
Publication status	Published - 15 Jun 2016

User-Defined Keywords

Bulk-heterojunction solar cell
Iridium(III) complex
Phosphorescence
Photovoltaics
Thiophene

UN SDGs

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

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10.1016/j.jorganchem.2016.03.003

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@article{dce3fe0d1f35419a8b377ab0f60e131f,

title = "New iridium(III) cyclometalates with extended absorption features for bulk heterojunction solar cells",

abstract = "Two new iridium(III) cyclometalates (A and B) based on 2-[5-(9,9′-diethyl-9H-fluoren-7-yl)thienyl]-pyridine were synthesized, characterized and applied in bulk-heterojunction solar cells (BHJSCs). Their absorption, electrochemical, thermal and photovoltaic properties have been investigated. The results reveal that the replacement of phenyl ring by thienyl one can extend the absorption wavelength up to 530 nm, thus narrowing the energy gap (Eg) to 2.93 eV and 2.81 eV for A and B, respectively. These complexes exhibit excellent thermal stability with the onset decomposition temperature at 5\% weight-loss (Td) of over 370 °C. The BHJSC device with A as donor blended with [6,6]-phenyl C61-butyric acid methyl ester (PCBM) gave the best power conversion efficiency (η) of 0.51\%, with a short-circuit photocurrent density (Jsc) of 2.68 mA cm-2, an open-circuit photovoltage (Voc) of 0.66 V and a fill factor (ff) of 0.28 under illumination of an AM 1.5 solar cell simulator.",

keywords = "Bulk-heterojunction solar cell, Iridium(III) complex, Phosphorescence, Photovoltaics, Thiophene",

author = "Guiping Tan and Peng Liu and Hao Wu and Yiu, \{Sze Chun\} and Fengrong Dai and Feng, \{Ying Hsuan\} and Xiaotian Liu and Yongfu Qiu and Lo, \{Yih Hsing\} and Ho, \{Cheuk Lam\} and Wong, \{Wai Yeung\}",

note = "Funding Information: The first two authors contributed equally to this work. We thank Hong Kong Research Grants Council ( HKBU12304715 ), Areas of Excellence Scheme, University Grants Committee of HKSAR (project No. [AoE/P-03/08]) and Hong Kong Baptist University ( FRG1/14-15/084 and FRG1/14-15/066 ) for financial support. Dr. Guiping Tan acknowledges the financial support from the Department of Education of Guangdong Province (No. 2014KQNCX219 ) and Guangdong Natural Science Foundation (No. 2015A030310242 ). Dr. Yongfu Qiu acknowledges the financial support from the National Natural Science Foundation of China (No. 51206029 ). Dr. Xiaotian Liu acknowledges the financial support from the Guangdong Natural Science Foundation of China (No. S2013010015690 ). Y. H. Lo gratefully acknowledges the financial support from the National Science Council of Taiwan ( NSC 102-2113-M-845-001 ) and the project of the specific research fields in the University of Taipei, Taiwan. ",

year = "2016",

month = jun,

day = "15",

doi = "10.1016/j.jorganchem.2016.03.003",

language = "English",

volume = "812",

pages = "280--286",

journal = "Journal of Organometallic Chemistry",

issn = "0022-328X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - New iridium(III) cyclometalates with extended absorption features for bulk heterojunction solar cells

AU - Tan, Guiping

AU - Liu, Peng

AU - Wu, Hao

AU - Yiu, Sze Chun

AU - Dai, Fengrong

AU - Feng, Ying Hsuan

AU - Liu, Xiaotian

AU - Qiu, Yongfu

AU - Lo, Yih Hsing

AU - Ho, Cheuk Lam

AU - Wong, Wai Yeung

N1 - Funding Information: The first two authors contributed equally to this work. We thank Hong Kong Research Grants Council ( HKBU12304715 ), Areas of Excellence Scheme, University Grants Committee of HKSAR (project No. [AoE/P-03/08]) and Hong Kong Baptist University ( FRG1/14-15/084 and FRG1/14-15/066 ) for financial support. Dr. Guiping Tan acknowledges the financial support from the Department of Education of Guangdong Province (No. 2014KQNCX219 ) and Guangdong Natural Science Foundation (No. 2015A030310242 ). Dr. Yongfu Qiu acknowledges the financial support from the National Natural Science Foundation of China (No. 51206029 ). Dr. Xiaotian Liu acknowledges the financial support from the Guangdong Natural Science Foundation of China (No. S2013010015690 ). Y. H. Lo gratefully acknowledges the financial support from the National Science Council of Taiwan ( NSC 102-2113-M-845-001 ) and the project of the specific research fields in the University of Taipei, Taiwan.

PY - 2016/6/15

Y1 - 2016/6/15

N2 - Two new iridium(III) cyclometalates (A and B) based on 2-[5-(9,9′-diethyl-9H-fluoren-7-yl)thienyl]-pyridine were synthesized, characterized and applied in bulk-heterojunction solar cells (BHJSCs). Their absorption, electrochemical, thermal and photovoltaic properties have been investigated. The results reveal that the replacement of phenyl ring by thienyl one can extend the absorption wavelength up to 530 nm, thus narrowing the energy gap (Eg) to 2.93 eV and 2.81 eV for A and B, respectively. These complexes exhibit excellent thermal stability with the onset decomposition temperature at 5% weight-loss (Td) of over 370 °C. The BHJSC device with A as donor blended with [6,6]-phenyl C61-butyric acid methyl ester (PCBM) gave the best power conversion efficiency (η) of 0.51%, with a short-circuit photocurrent density (Jsc) of 2.68 mA cm-2, an open-circuit photovoltage (Voc) of 0.66 V and a fill factor (ff) of 0.28 under illumination of an AM 1.5 solar cell simulator.

AB - Two new iridium(III) cyclometalates (A and B) based on 2-[5-(9,9′-diethyl-9H-fluoren-7-yl)thienyl]-pyridine were synthesized, characterized and applied in bulk-heterojunction solar cells (BHJSCs). Their absorption, electrochemical, thermal and photovoltaic properties have been investigated. The results reveal that the replacement of phenyl ring by thienyl one can extend the absorption wavelength up to 530 nm, thus narrowing the energy gap (Eg) to 2.93 eV and 2.81 eV for A and B, respectively. These complexes exhibit excellent thermal stability with the onset decomposition temperature at 5% weight-loss (Td) of over 370 °C. The BHJSC device with A as donor blended with [6,6]-phenyl C61-butyric acid methyl ester (PCBM) gave the best power conversion efficiency (η) of 0.51%, with a short-circuit photocurrent density (Jsc) of 2.68 mA cm-2, an open-circuit photovoltage (Voc) of 0.66 V and a fill factor (ff) of 0.28 under illumination of an AM 1.5 solar cell simulator.

KW - Bulk-heterojunction solar cell

KW - Iridium(III) complex

KW - Phosphorescence

KW - Photovoltaics

KW - Thiophene

UR - https://www.scopus.com/pages/publications/84961799055

U2 - 10.1016/j.jorganchem.2016.03.003

DO - 10.1016/j.jorganchem.2016.03.003

M3 - Journal article

AN - SCOPUS:84961799055

SN - 0022-328X

VL - 812

SP - 280

EP - 286

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

ER -

New iridium(III) cyclometalates with extended absorption features for bulk heterojunction solar cells

Abstract

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