Low Open-Circuit Voltage Loss in Solution-Processed Small-Molecule Organic Solar Cells

被引：60

作者：

Tuladhar, Sachetan M. ^{[1
,2
]}

Azzouzi, Mohammed ^{[1
,2
,3
]}

Delval, Florent ^{[1
,2
,3
]}

Yao, Jizhong ^{[1
,2
]}

Guilbert, Anne A. Y. ^{[1
,2
]}

Kirchartz, Thomas ^{[4
,5
,6
]}

Montcada, Nuria F. ^{[7
]}

Dominguez, Rocio ^{[8
]}

Langa, Fernando ^{[8
]}

Palomares, Emilio ^{[7
]}

Nelson, Jenny ^{[1
,2
,9
]}

机构：

[1] Imperial Coll London, Dept Phys, London SW7 2AZ, England

[2] Imperial Coll London, Ctr Plast Elect, London SW7 2AZ, England

[3] Univ Paris Sanclay, Ecole Polytech, F-91128 Palaiseau, France

[4] Forschungszentrum Julich, Photovolta IEK5, D-52425 Julich, Germany

[5] Univ Duisburg Essen, Fac Engn, Carl Benz Str 199, D-47057 Duisburg, Germany

[6] Univ Duisburg Essen, CENIDE, Carl Benz Str 199, D-47057 Duisburg, Germany

[7] Barcelona Inst Sci & Technol, Inst Chem Res Catalonia ICIQ, Avinguda Paisos Catalans 16, Tarragona 43007, Spain

[8] Univ Castilla La Mancha, Inst Nanosci Nanotechnol & Mol Mat INAMOL, Campus Fabrica, Toledo 45071, Spain

[9] ICREA, Passeig LLuis Co 23, E-08010 Barcelona, Spain

来源：

ACS ENERGY LETTERS | 2016年 / 1卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

CHARGE-TRANSFER STATE; QUANTUM EFFICIENCY; ENERGY-LOSSES; ACCEPTOR; DONOR; BREAKING;

D O I：

10.1021/acsenergylett.6b00162

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：

We analyze the voltage losses at open circuit in solution processed, small-molecule:fullerene blend solar cells, using electroluminescence and external quantum efficiency measurements and the reciprocity relationship between light absorption and emission. For solar cells made from oligo-thienylenevinylene-based donors and phenyl-C-71, butyric acid methyl ester (PC71BM), we find that the voltage loss due to the finite breadth of the absorption edge is remarkably small, less than 0.01 eV in the best cases, while the voltage loss due to nonradiative recombination reaches 0.29 eV, one of the smallest values reported for an organic solar cell. As a result, the open-circuit voltage reaches around 1.0 V for an optical gap of 1.6 eV, greatly exceeding the voltage of a high-performance polymer-based system with similar optical gap. We assign the remarkably small absorption broadening loss to a low degree of energetic disorder in the small-molecule system that allows efficient charge separation typical conjugated polymer blends.

引用

页码：302 / 308

页数：7

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