Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses

Zhiming Kam; Qingyi Yang; Xizu Wang; Bo Wu; Fu Rong ZHU; Jie Zhang; Jishan Wu

doi:10.1016/j.orgel.2014.03.032

Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses

Zhiming Kam, Qingyi Yang, Xizu Wang, Bo Wu, Fu Rong ZHU^*, Jie Zhang, Jishan Wu

^*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.

Original language	English
Pages (from-to)	1306-1311
Number of pages	6
Journal	Organic Electronics
Volume	15
Issue number	7
DOIs	https://doi.org/10.1016/j.orgel.2014.03.032
Publication status	Published - Jul 2014

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

User-Defined Keywords

Lifetime
Optical admittance analysis
Organic solar cells
Transient photocurrent

UN SDGs

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10.1016/j.orgel.2014.03.032

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title = "Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses",

abstract = "Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.",

keywords = "Lifetime, Optical admittance analysis, Organic solar cells, Transient photocurrent",

author = "Zhiming Kam and Qingyi Yang and Xizu Wang and Bo Wu and ZHU, {Fu Rong} and Jie Zhang and Jishan Wu",

note = "Funding Information: The work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China. Project No. T23-713/11, the National Natural Science Foundation of China (Grant No. 61275037 ) and Hong Kong Baptist University Faculty Research Grant (Project No. 30-12-252 ). J.W. acknowledges financial support from IMRE Core Funding ( IMRE/13-1C0205 ) and MOE Tier 2 Grant ( MOE2011-T2-2-130 ). J.Z. acknowledges the support from STAR SERC TSRP Grant (Project No. 102 170 0137 ).",

year = "2014",

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doi = "10.1016/j.orgel.2014.03.032",

language = "English",

volume = "15",

pages = "1306--1311",

journal = "Organic Electronics",

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AU - Kam, Zhiming

AU - Yang, Qingyi

AU - Wang, Xizu

AU - Wu, Bo

AU - ZHU, Fu Rong

AU - Zhang, Jie

AU - Wu, Jishan

N1 - Funding Information: The work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China. Project No. T23-713/11, the National Natural Science Foundation of China (Grant No. 61275037 ) and Hong Kong Baptist University Faculty Research Grant (Project No. 30-12-252 ). J.W. acknowledges financial support from IMRE Core Funding ( IMRE/13-1C0205 ) and MOE Tier 2 Grant ( MOE2011-T2-2-130 ). J.Z. acknowledges the support from STAR SERC TSRP Grant (Project No. 102 170 0137 ).

PY - 2014/7

Y1 - 2014/7

N2 - Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.

AB - Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.

KW - Lifetime

KW - Optical admittance analysis

KW - Organic solar cells

KW - Transient photocurrent

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Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses

Abstract

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