Charge Transfer State Versus Hot Exciton Dissociation in Polymer-Fullerene Blended Solar Cells

被引：310

作者：

Lee, Jiye ^{[1
]}

Vandewal, Koen ^{[2
,3
]}

Yost, Shane R. ^{[4
]}

Bahlke, Matthias E. ^{[1
]}

Goris, Ludwig ^{[2
,3
]}

Baldo, Marc A. ^{[1
]}

Manca, Jean V. ^{[2
,3
]}

Van Voorhis, Troy ^{[4
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Hasselt Univ, IMEC IMOMEC, Vzw, B-3590 Diepenbeek, Belgium

[3] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium

[4] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 34期

关键词：

DENSITY-FUNCTIONAL THEORY; OPEN-CIRCUIT VOLTAGE; SPECTROSCOPY; ABSORPTION; FILMS; ELECTROLUMINESCENCE; DEPENDENCE;

D O I：

10.1021/ja1045742

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We examine the significance of hot exciton dissociation in two archetypical polymer fullerene blend solar cells. Rather than evolving through a bound charge transfer state, hot processes are proposed to convert excitons directly into free charges. But we find that the internal quantum yields of carrier photogeneration are similar for both excitons and direct excitation of charge transfer states. The internal quantum yield, together with the temperature dependence of the current voltage characteristics, is consistent with negligible impact from hot exciton dissociation.

引用

页码：11878 / 11880

页数：3

共 24 条

[1] Charge-transfer complexes of conjugated polymers as intermediates in charge photogeneration for organic photovoltaics [J].

Bakulin, Artem A. ;

Martyanov, Dmitry ;

Paraschuk, Dmitry Yu. ;

van Loosdrecht, Paul H. M. ;

Pshenichnikov, Maxim S. .

CHEMICAL PHYSICS LETTERS, 2009, 482 (1-3) :99-104

[2] Formation of a ground-state charge-transfer complex in polyfluorene/[6,6]-phenyl-C61 butyric acid methyl ester (PCBM) blend films and its role in the function of polymer/PCBM solar cells [J].

Benson-Smith, Jessica J. ;

Goris, Ludwig ;

Vandewal, Koen ;

Haenen, Ken ;

Manca, Jean V. ;

Vanderzande, Dirk ;

Bradley, Donal D. C. ;

Nelson, Jenny .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (03) :451-457

[3] 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

[4] Free Energy Control of Charge Photogeneration in Polythiophene/Fullerene Solar Cells: The Influence of Thermal Annealing on P3HT/PCBM Blends [J].

Clarke, Tracey M. ;

Ballantyne, Amy M. ;

Nelson, Jenny ;

Bradley, Donal D. C. ;

Durrant, James R. .

ADVANCED FUNCTIONAL MATERIALS, 2008, 18 (24) :4029-4035

[5] Insights into current limitations of density functional theory [J].

Cohen, Aron J. ;

Mori-Sanchez, Paula ;

Yang, Weitao .

SCIENCE, 2008, 321 (5890) :792-794

[6] Carrier dynamics resulting from above and below gap excitation of P3HT and P3HT/PCBM investigated by optical-pump terahertz-probe spectroscopy [J].

Cunningham, Paul D. ;

Hayden, L. Michael .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (21) :7928-7935

[7] Below-gap excitation of π-conjugated polymer-fullerene blends:: Implications for bulk organic heterojunction solar cells [J].

Drori, T. ;

Sheng, C. -X. ;

Ndobe, A. ;

Singh, S. ;

Holt, J. ;

Vardeny, Z. V. .

PHYSICAL REVIEW LETTERS, 2008, 101 (03)

[8] Observation of the subgap optical absorption in polymer-fullerene blend solar cells -: art. no. 052113 [J].

Goris, L ;

Poruba, A ;

Hod'ákova, L ;

Vanecek, M ;

Haenen, K ;

Nesládek, M ;

Wagner, P ;

Vanderzande, D ;

De Schepper, L ;

Manca, JV .

APPLIED PHYSICS LETTERS, 2006, 88 (05) :1-3

[9] Absorption phenomena in organic thin films for solar cell applications investigated by photothermal deflection spectroscopy [J].

Goris, L ;

Haenen, K ;

Nesládek, M ;

Wagner, P ;

Vanderzande, D ;

De Schepper, L ;

D'Haen, J ;

Lutsen, L ;

Manca, JV .

JOURNAL OF MATERIALS SCIENCE, 2005, 40 (06) :1413-1418

[10] Temperature dependence of exciton diffusion in conjugated polymers [J].

Mikhnenko, O. V. ;

Cordella, F. ;

Sieval, A. B. ;

Hummelen, J. C. ;

Blom, P. W. M. ;

Loi, M. A. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2008, 112 (37) :11601-11604

← 1 2 3 →