Efficiency limitations in a low band-gap diketopyrrolopyrrole-based polymer solar cell

被引：16

作者：

Albert-Seifried, Sebastian ^{[1
]}

Ko, Doo-Hyun ^{[1
,2
]}

Huettner, Sven ^{[1
]}

Kanimozhi, Catherine ^{[3
]}

Patil, Satish ^{[3
]}

Friend, Richard H. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Phys, Cavendish Lab, Cambridge CB3 0HE, England

[2] Korea Inst Sci & Technol, Ctr Optoelect Convergence Syst, Seoul 136791, South Korea

[3] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

NANOSCALE MORPHOLOGY; EXCITED-STATE; ENERGY; PHOTOCURRENT; ADDITIVES; CRYSTALLIZATION; ENHANCEMENT; PERFORMANCE; SEPARATION;

D O I：

10.1039/c4cp00485j

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 report the performance and photophysics of a low band-gap diketopyrrolopyrrole-based copolymer used in bulk heterojunction devices in combination with PC71BM. We show that the short lifetime of photogenerated excitons in the polymer constitutes an obstacle towards device efficiency by limiting the diffusion range of the exciton to the donor-acceptor heterojunction. We employ ultrafast transient-probe and fluorescence spectroscopy techniques to examine the excited state loss channels inside the devices. We use the high boiling point solvent additive 1,8-diiodooctane (DIO) to study the photoexcited state losses in different blend morphologies. The solvent additive acts as a compatibiliser between the donor and the acceptor material and leads to smaller domain sizes, higher charge formation yields and increased device efficiency.

引用

页码：6743 / 6752

页数：10

共 44 条

[1] Measurement of thermal modulation of optical absorption in pump-probe spectroscopy of semiconducting polymers [J].

Albert-Seifried, Sebastian ;

Friend, Richard H. .

APPLIED PHYSICS LETTERS, 2011, 98 (22)

[2] The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors [J].

Bakulin, Artem A. ;

Rao, Akshay ;

Pavelyev, Vlad G. ;

van Loosdrecht, Paul H. M. ;

Pshenichnikov, Maxim S. ;

Niedzialek, Dorota ;

Cornil, Jerome ;

Beljonne, David ;

Friend, Richard H. .

SCIENCE, 2012, 335 (6074) :1340-1344

[3] Phase-Dependent Photocurrent Generation in Polymer/Fullerene Bulk Heterojunction Solar Cells [J].

Brenner, Thomas J. K. ;

Li, Zhe ;

McNeill, Christopher R. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (44) :22075-22083

[4] Low-Temperature Control of Nanoscale Morphology for High Performance Polymer Photovoltaics [J].

Campbell, Andrew R. ;

Hodgkiss, Justin M. ;

Westenhoff, Sebastian ;

Howard, Ian A. ;

Marsh, Robert A. ;

McNeill, Christopher R. ;

Friend, Richard H. ;

Greenham, Neil C. .

NANO LETTERS, 2008, 8 (11) :3942-3947

[5]

Chow P., UNPUB

[6] Few-optical-cycle pulses in the near-infrared from a noncollinear optical parametric amplifier [J].

Cirmi, G. ;

Brida, D. ;

Manzoni, C. ;

Marangoni, M. ;

De Silvestri, S. ;

Cerullo, G. .

OPTICS LETTERS, 2007, 32 (16) :2396-2398

[7] 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)

[8] Transient absorption spectroscopy of charge photogeneration yields and lifetimes in a low bandgap polymer/fullerene film [J].

Clarke, Tracey ;

Ballantyne, Amy ;

Jamieson, Fiona ;

Brabec, Christoph ;

Nelson, Jenny ;

Durrant, James .

CHEMICAL COMMUNICATIONS, 2009, (01) :89-91

[9] Estimate of singlet diffusion lengths in PCBM films by time-resolved emission studies [J].

Cook, Steffan ;

Furube, Akihiro ;

Katoh, Ryuzi ;

Han, Liyuan .

CHEMICAL PHYSICS LETTERS, 2009, 478 (1-3) :33-36

[10] Insights from Transient Optoelectronic Analyses on the Open-Circuit Voltage of Organic Solar Cells [J].

Credgington, Dan ;

Durrant, James R. .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2012, 3 (11) :1465-1478

← 1 2 3 4 5 →