Correlation between the Open Circuit Voltage and the Energetics of Organic Bulk Heterojunction Solar Cells

被引：62

作者：

Lange, Ilja ^{[1
]}

Kniepert, Juliane ^{[1
]}

Pingel, Patrick ^{[1
]}

Dumsch, Ines ^{[2
]}

Allard, Sybille ^{[2
]}

Janietz, Silvia ^{[3
]}

Scherf, Ullrich ^{[2
]}

Neher, Dieter ^{[1
]}

机构：

[1] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany

[2] Berg Univ Wuppertal, Inst Polymer Technol, D-42097 Wuppertal, Germany

[3] Frauenhofer Inst Angew Polymerforsch, D-14476 Golm, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2013年 / 4卷 / 22期

关键词：

CHARGE-TRANSFER; ELECTRONIC-STRUCTURE; POLYMER; RECOMBINATION; ENERGY; PHOTOGENERATION; SPECTROSCOPY; ABSORPTION; MORPHOLOGY; EFFICIENCY;

D O I：

10.1021/jz401971e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A detailed investigation of the open circuit voltage (V-OC) of organic bulk heterojunction solar cells comprising three different donor polymers and two different fullerene-based acceptors is presented. Bias amplified charge extraction (BACE) is combined with Kelvin Probe measurements to derive information on the relevant energetics in the blend. On the example of P3HT:PC70BM the influence of composition and preparation conditions on the relevant transport levels will be shown. Moderate upward shifts of the P3HT HOMO depending on crystallinity are observed, but contrarily to common believe, the dependence of V-OC on blend composition and thermal history is found to be largely determined by the change in the PCBM LUMO energy. Following this approach, we quantified the energetic contribution to the V-OC in blends with fluorinated polymers or higher adduct fullerenes.

引用

页码：3865 / 3871

页数：7

共 42 条

[1] Spontaneous Charge Transfer and Dipole Formation at the Interface Between P3HT and PCBM [J].

Aarnio, Harri ;

Sehati, Parisa ;

Braun, Slawomir ;

Nyman, Mathias ;

de Jong, Michel P. ;

Fahlman, Mats ;

Osterbacka, Ronald .

ADVANCED ENERGY MATERIALS, 2011, 1 (05) :792-797

[2] Fluorinated Copolymer PCPDTBT with Enhanced Open-Circuit Voltage and Reduced Recombination for Highly Efficient Polymer Solar Cells [J].

Albrecht, Steve ;

Janietz, Silvia ;

Schindler, Wolfram ;

Frisch, Johannes ;

Kurpiers, Jona ;

Kniepert, Juliane ;

Inal, Sahika ;

Pingel, Patrick ;

Fostiropoulos, Konstantinos ;

Koch, Norbert ;

Neher, Dieter .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (36) :14932-14944

[3] CHARGE TRANSPORT IN DISORDERED ORGANIC PHOTOCONDUCTORS - A MONTE-CARLO SIMULATION STUDY [J].

BASSLER, H .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1993, 175 (01) :15-56

[4] Direct comparison of photoemission spectroscopy and in situ Kelvin probe work function measurements on indium tin oxide films [J].

Beerbom, M. M. ;

Lagel, B. ;

Cascio, A. J. ;

Doran, B. V. ;

Schlaf, R. .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2006, 152 (1-2) :12-17

[5] Relationship between energetic disorder and open-circuit voltage in bulk heterojunction organic solar cells [J].

Blakesley, James C. ;

Neher, Dieter .

PHYSICAL REVIEW B, 2011, 84 (07)

[6] Charge transfer at polymer-electrode interfaces: The effect of energetic disorder and thermal injection on band bending and open-circuit voltage [J].

Blakesley, James C. ;

Greenham, Neil C. .

JOURNAL OF APPLIED PHYSICS, 2009, 106 (03)

[7] Determination of gap defect states in organic bulk heterojunction solar cells from capacitance measurements [J].

Boix, Pablo P. ;

Garcia-Belmonte, Germa ;

Munecas, Udane ;

Neophytou, Marios ;

Waldauf, Christoph ;

Pacios, Roberto .

APPLIED PHYSICS LETTERS, 2009, 95 (23)

[8] Theoretical Study of the Organic Photovoltaic Electron Acceptor PCBM: Morphology, Electronic Structure, and Charge Localization [J].

Cheung, David L. ;

Troisi, Alessandro .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (48) :20479-20488

[9] Role of intermolecular coupling in the photophysics of disordered organic semiconductors: Aggregate emission in regioregular polythiophene [J].

Clark, Jenny ;

Silva, Carlos ;

Friend, Richard H. ;

Spano, Frank C. .

PHYSICAL REVIEW LETTERS, 2007, 98 (20)

[10] Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy [J].

Clark, Jenny ;

Chang, Jui-Fen ;

Spano, Frank C. ;

Friend, Richard H. ;

Silva, Carlos .

APPLIED PHYSICS LETTERS, 2009, 94 (16)

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