Limits of open circuit voltage in organic photovoltaic devices

Lo, Ming‐Fai; Ng, Tsz‐Wai; Liu, T. Z.; Roy, V. A. L.; Lai, Shiu-Lun; Fung, Man‐Keung; Lee, C. S.; Lee, S. T.

doi:10.1063/1.3360336

Cited by 73 publications

(37 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample 4, containing ST clearly produces higher open circuit voltage and short circuit current than sample 1. From the theory stated above one explanation for the increase in current is the increased numbers of [23,24]. We anticipate additional measurements in the near future to confirm the increase in permittivity of the material and to determine the variations in the built in potential.…”

Section: Resultsmentioning

confidence: 99%

Route to enhance the efficiency of organic photovoltaic solar cells - by adding ferroelectric nanoparticles to P3HT/PCBM admixture

2014

View full text Add to dashboard Cite

We have demonstrated that by adding ferroelectric nanoparticles to poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) photovoltaic devices the relative efficiency can be increased compared to the same blend without these nanoparticles. In this work samples of 20 mg/ml concentrations of P3HT and PCBM were prepared in a 1:1 ratio and the samples prepared using ferroelectric barium titanate (BT) and strontium titanate (ST) nanoparticles in a 1:1:0.5 ratio. The samples were spin coated onto ITO coated glass with a layer of poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOT:PSS). A top electrode of aluminium 1 cm 2 was deposited. The current-voltage characteristics of the devices were determined using a solar simulator and the absorption characteristics by UV-Vis spectroscopy. The samples with BT and ST exhibited increased absorption around 490 nm and increased open circuit voltage and short circuit current compared to the control P3HT/PCBM sample. The possible mechanism that helps to understand the increase in open circuit voltage and short circuit current is also proposed in this work.

show abstract

Section: Resultsmentioning

confidence: 99%

Route to enhance the efficiency of organic photovoltaic solar cells - by adding ferroelectric nanoparticles to P3HT/PCBM admixture

2014

View full text Add to dashboard Cite

show abstract

“…5 The contour plots of frontier molecular orbital for all D-A dimer models Fig. 6 Photovoltaic parameters of all studied molecules 0 eV [34]. So the V OC of the polymer-PC 61 BM solar cell can be estimated as Eq.…”

Section: Photovoltaic Propertiesmentioning

confidence: 99%

Computational study on the effects of substituent and heteroatom on physical properties and solar cell performance in donor-acceptor conjugated polymers based on benzodithiophene

Zhang

Shen

et al. 2014

J Mol Model

View full text Add to dashboard Cite

Computationally driven material design has attracted increasing interest to accelerate the search for optimal conjugated donor materials in bulk heterojunction organic solar cells. A series of novel copolymers containing benzo[1,2-b:4,5-b']dithiophene (BDT) and thieno[3,4-c]pyrrole-4,6-dione (TPD) derivatives were simulated by density functional theory (DFT) and time-dependent density functional theory (TD-DFT). We performed a systematic study on the influences on molecular geometry parameters, electronic properties, optical properties, photovoltaic performances, and intermolecular stacking as well as hole mobility when different chalcogenophenes in TPD derivatives were used and functional groups with different electron-withdrawing abilities such as alkyl, fluorine, sufonyl, and cyano were introduced to the nitrogen positions in electron-deficient units. The substitution position of electron-withdrawing groups may cause little steric hindrance to the neighboring donor units, especially fluorine and cyano group. It was found that the incorporation of these new electron-deficient substituents and sulfur-selenium exchange can be applicable to further modify and optimize existing molecular structures. Our findings will provide valuable guidance and chemical methodologies for a judicious material design of conjugated polymers for solar cell applications with desirable photovoltaic characteristics.

show abstract

“…Organic photovoltaic (OPV) device is considered as a next generation solar cell with merits of low cost, lightweight etc [1][2][3][4]. Performance enhancement has been achieved by both employing better light harvesting materials and smart device structures [2,[5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effects of idling time between depositions of organic layers and metal electrode in organic photovoltaic device

Chandran

Qing

Zhang

et al. 2015

Organic Electronics

View full text Add to dashboard Cite

Limits of open circuit voltage in organic photovoltaic devices

Cited by 73 publications

References 17 publications

Route to enhance the efficiency of organic photovoltaic solar cells - by adding ferroelectric nanoparticles to P3HT/PCBM admixture

Route to enhance the efficiency of organic photovoltaic solar cells - by adding ferroelectric nanoparticles to P3HT/PCBM admixture

Computational study on the effects of substituent and heteroatom on physical properties and solar cell performance in donor-acceptor conjugated polymers based on benzodithiophene

Effects of idling time between depositions of organic layers and metal electrode in organic photovoltaic device

Contact Info

Product

Resources

About