An Easily Synthesized Blue Polymer for High‐Performance Polymer Solar Cells

Wang, Ergang; Hou, Lintao; Wang, Zhongqiang; Hellström, Stefan; Zhang, Fengling; Inganäs, Olle; Andersson, Mats R.

doi:10.1002/adma.201002225

Cited by 450 publications

(397 citation statements)

References 33 publications

Supporting

Mentioning

386

Contrasting

Order By: Relevance

“…TQ1 was synthesized according to previously published procedures, 52 and PC71BM was purchased from Solenne Netherlands. For device preparation, PEDOT:PSS layer (40 nm) was spin-coated onto cleaned ITO (indium-tin-oxide) substrates, which were subsequently annealed at 120 °C for 30 minutes before being transferred into a glovebox for further fabrication.…”

Section: Methodsmentioning

confidence: 99%

“…It is well known that in a majority of polymer/fullerene blends, 24 including TQ1:PC71BM, 52 an increase of the acceptor fraction has a positive effect on the local morphology and charge extraction.…”

Section: External Field Effectmentioning

confidence: 99%

“…These solar cells provide efficiencies up to 6% 52 , and therefore represent a promising molecular system for the development of organic photovoltaics. We have investigated the morphology, temperature and external field dependence of these devices using CT PL, photocurrent, and pump-push photocurrent (PPP) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphology, Temperature, and Field Dependence of Charge Separation in High-Efficiency Solar Cells Based on Alternating Polyquinoxaline Copolymer

et al. 2016

Self Cite

View full text Add to dashboard Cite

Charge separation and recombination are key processes determining the performance of organic optoelectronic devices. Here we combine photoluminescence and photovoltaic characterisation of organic solar cell devices with ultrafast multi-pulse photocurrent spectroscopy to investigate charge generation mechanisms in the organic photovoltaic devices based on a blend of an alternating polyquinoxaline copolymer with fullerene. The combined use of these techniques enables the determination of the contributions of geminate and bimolecular processes to the solar cell performance. We observe that charge separation is not a temperature-activated process in the studied materials. At the same time, the generation of free charges shows a clear external-field and morphology dependence. This indicates that the critical step of charge separation involves the non-equilibrium state that is formed at early times after photoexcitation, when the polaronic localisation is not yet complete. This work reveals new aspects of molecular level charge dynamics in the organic light-conversion systems.2 Introduction:

show abstract

Section: Methodsmentioning

confidence: 99%

Section: External Field Effectmentioning

confidence: 99%

See 1 more Smart Citation

Morphology, Temperature, and Field Dependence of Charge Separation in High-Efficiency Solar Cells Based on Alternating Polyquinoxaline Copolymer

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8] These improvements have been mainly driven by significant progresses in materials synthesis and device engineering. In spite of the great success in device efficiency, many fundamental issues concerning basic operational mechanisms of these devices remain unknown or controversial, limiting further improvement of the device performance.…”

Section: Introductionmentioning

confidence: 99%

Charge generation in polymer–fullerene bulk-heterojunction solar cells

Gao

Inganäs

2014

Phys. Chem. Chem. Phys.

Self Cite

204

252

View full text Add to dashboard Cite

Charge generation in organic solar cells is a fundamental yet heavily debated issue. This article gives a balanced review of different mechanisms proposed to explain efficient charge generation in polymer-fullerene bulk-heterojunction solar cells. We discuss the effect of charge-transfer states, excess energy, external electric field, temperature, disorder of the materials, and delocalisation of the charge carriers on charge generation. Although a general consensus has not been reached yet, recent findings, based on both steady-state and transient measurements, have significantly advanced our understanding of this process.2

show abstract

“…Using phenylenes and fluorenes as main chain polymer has given us access to many polymers with suitable optical and electronic properties, including the appropriate electronic structure ), but never delivering higher power conversion efficiencies than 4% in simulated solar light. More recently, using simple alternating copolymers of thiophenes with acceptors such as quinoline, we have improved efficiencies to 6%, due to better spectral match with the solar spectrum, and more effective charge generation (Wang et al 2010a) (see Fig. 1).…”

Section: Designer Polymersmentioning

confidence: 99%

Alternating Copolymers and Alternative Device Geometries for Organic Photovoltaics

Inganäs

Zhang

Andersson

2012

AMBIO

Self Cite

View full text Add to dashboard Cite

The efficiency of conversion of light to electrical energy with the help of conjugated polymers and molecules is rapidly improving. The optical absorption properties of these materials can be designed, and implemented via molecular engineering. Full coverage of the solar spectrum is thus feasible. Narrow absorption spectra allow construction of tandem solar cells. The poor transport properties of these materials require thin devices, which limits optical absorption. Alternative device geometries for these flexible materials compensate for the optical absorption by light trapping, and allow tandem cells.

show abstract

An Easily Synthesized Blue Polymer for High‐Performance Polymer Solar Cells

Cited by 450 publications

References 33 publications

Morphology, Temperature, and Field Dependence of Charge Separation in High-Efficiency Solar Cells Based on Alternating Polyquinoxaline Copolymer

Morphology, Temperature, and Field Dependence of Charge Separation in High-Efficiency Solar Cells Based on Alternating Polyquinoxaline Copolymer

Charge generation in polymer–fullerene bulk-heterojunction solar cells

Alternating Copolymers and Alternative Device Geometries for Organic Photovoltaics

Contact Info

Product

Resources

About