Efficiency Limitations in Organic Bulk Heterojunction Solar Cells

被引：0

作者：

Li, Kejia ^{[1
,3
]}

Li, Lijun ^{[1
,3
]}

Khlyabich, Petr P. ^{[2
,3
]}

Burkhart, Beate ^{[2
,3
]}

Thompson, Barry C. ^{[2
,3
]}

Campbell, Joe C. ^{[1
,3
]}

机构：

[1] Univ Virginia, Dept Elect & Comp Engn, Charlottesville, VA 22903 USA

[2] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA

[3] Univ So Calif, Ctr Energy Nanosci, Los Angeles, CA 90089 USA

来源：

2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) | 2012年

关键词：

carrier loss; efficiency limit; organic heterojunction solar cells; traps; EXCITON DIFFUSION; RECOMBINATION; DISSOCIATION;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper presents a systematic study of key physical mechanisms in organic polymer/fullerene solar cells that determine the power conversion efficiency. The carrier loss at each step is calculated or measured. We compare poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and poly(3-hexylthiophene)-thiophene-thienopyrazine (P3HTT-TP)/PCBM solar cells. The latter polymer, P3HTT-TP, is a novel low-bandgap "semi-random" alkythiophene-based copolymer with a broader absorption spectrum than P3HT. Absorption, a significant loss factor for all polymer/fullerene solar cells, was studied using external quantum efficiency and absorption spectroscopy measurements and modeled with a multi-layer transfer-matrix theory. In addition, hole traps inside the polymers play an important role in polaron pair dissociation and free charge transport. It was found that this is particularly deleterious for P3HTT-TP/PCBM.

引用

页码：3035 / 3039

页数：5

共 26 条

[1] Device physics of polymer:fullerene bulk heterojunction solar cells [J].

Blom, Paul W. M. ;

Mihailetchi, Valentin D. ;

Koster, L. Jan Anton ;

Markov, Denis E. .

ADVANCED MATERIALS, 2007, 19 (12) :1551-1566

[2] ELECTRIC-FIELD ASSISTED DISSOCIATION OF CHARGE-TRANSFER STATES AS A MECHANISM OF PHOTOCARRIER PRODUCTION [J].

BRAUN, CL .

JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) :4157-4161

[3] Accounting for Interference, Scattering, and Electrode Absorption to Make Accurate Internal Quantum Efficiency Measurements in Organic and Other Thin Solar Cells [J].

Burkhard, George F. ;

Hoke, Eric T. ;

McGehee, Michael D. .

ADVANCED MATERIALS, 2010, 22 (30) :3293-+

[4] "Semi-Random" Multichromophoric rr-P3HT Analogues for Solar Photon Harvesting [J].

Burkhart, Beate ;

Khlyabich, Petr P. ;

Canak, Tuba Cakir ;

LaJoie, Travis W. ;

Thompson, Barry C. .

MACROMOLECULES, 2011, 44 (06) :1242-1246

[5] Transient photoconductivity in polymer bulk heterojunction solar cells: Competition between sweep-out and recombination [J].

Cowan, Sarah R. ;

Street, R. A. ;

Cho, Shinuk ;

Heeger, A. J. .

PHYSICAL REVIEW B, 2011, 83 (03)

[6] Recombination in polymer-fullerene bulk heterojunction solar cells [J].

Cowan, Sarah R. ;

Roy, Anshuman ;

Heeger, Alan J. .

PHYSICAL REVIEW B, 2010, 82 (24)

[7] Polymer-fullerene bulk heterojunction solar cells [J].

Deibel, Carsten ;

Dyakonov, Vladimir .

REPORTS ON PROGRESS IN PHYSICS, 2010, 73 (09)

[8] Exciton diffusion and dissociation in conjugated polymer fullerene blends and heterostructures [J].

Haugeneder, A ;

Neges, M ;

Kallinger, C ;

Spirkl, W ;

Lemmer, U ;

Feldmann, J ;

Scherf, U ;

Harth, E ;

Gügel, A ;

Müllen, K .

PHYSICAL REVIEW B, 1999, 59 (23) :15346-15351

[9]

Heavens O.S, 1955, Optical Properties of Thin Solid Films

[10] Organic solar cells: An overview [J].

Hoppe, H ;

Sariciftci, NS .

JOURNAL OF MATERIALS RESEARCH, 2004, 19 (07) :1924-1945

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