Improvement in stability of poly(3-hexylthiophene-2,5-diyl)/[6,6]-phenyl-C61-butyric acid methyl ester bulk heterojunction solar cell by using UV light irradiation

Moujoud, Abderrafia; Oh, Sang Hoon; Hye, Jung Joo; Kim, Hyun Jae

doi:10.1016/j.solmat.2010.08.019

Cited by 20 publications

(10 citation statements)

References 26 publications

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“…Currently, much effort has been made by a number of research groups to stabilize the active layer morphology and some methods, for example, decreasing the crystallinity of polythiophenes, constructing densely distributed P3HT nanofibers, adopting amorphous fullerene electron acceptor, introducing compatibilizer, cross‐linking, and other techniques restricting the movement of acceptor molecules, have been developed and substantially improved the morphological stability of the BHJ‐based solar cells.…”

Section: Introductionmentioning

confidence: 99%

Improved Thermal Stability of Polymer Solar Cells by Incorporating Porphyrins

Wang

et al. 2014

Adv Funct Materials

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Thermal stability has been the important issue in organic solar cell, especially for the large scale fabrication and application in the future. In this work, a new strategy involving the introduction of porphyrin compound (BL) is proposed to prevent the [6,6]‐phenyl C61 butyric acid methyl ester (PC61BM) aggregation. The supramolecular interactions between PC61BM and BL are first demonstrated in PC61BM:BL binary blend, and then the effect of BL on P3HT:PC61BM blend is qualitatively and quantitatively studied by differential scanning calorimetry, UV–vis absorption spectroscopy, atomic force microscopy, optical microscopy, and fluorescence techniques. It is found that the BL addition not only stabilizes the morphology of P3HT:PC61BM blend films, but also shows a good ability to maintain the electron mobility by depressing the PC61BM crystallization. And the thermal stability of the devices based on P3HT:PC61BM:BL ternary blend films is therefore greatly improved. For example, 8 wt% BL doping drops the power conversion efficiency by 10.5% relative to its peak value after 48 h of annealing at 130 °C, while 71.5% of decrease is obtained for the device without BL after only 3 h of annealing. This strategy is preliminarily proved to be universal and will show great potentials in future commercialization of polymer solar cells.

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Section: Introductionmentioning

confidence: 99%

Improved Thermal Stability of Polymer Solar Cells by Incorporating Porphyrins

Wang

et al. 2014

Adv Funct Materials

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“…Gholamkhass and Holdcroft replaced part of the PEDOT:PSS with gold nano‐dots to improve device stability in accelerated aging tests 200. While UV irradiation generally degrades polymer photovoltaic devices through photo oxidation reactions of the active layer it has been argued that UV treatment of the PEDOT:PSS layer actually increases the lifetime 201. Mixed oxides (WO 3 –V 2 O 5 ) have been used by Huang et al to replace PEDOT:PSS creating air stable inverted devices 202…”

Section: Materials Stabilitymentioning

confidence: 99%

Testing of DNT and TNT by the Mini‐Autoclave Method

Knorr

Krebs

2014

Propellants Explo Pyrotec

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Autoclave methods are commonly used when pressure progress under thermal stress is of interest. One of them is the mini‐autoclave method by Kühner AG. To test the robustness of the equipment under powerful exposure, two known high energetic materials, DNT and TNT, were investigated. The sample mass was increased stepwise in the range from 0.25 g to 1.0 g. For one test (1 g TNT), gas burners instead of the usually employed 2‐zone heating block, were used to intensify the test conditions. Results showed the expected slower pressure generation of DNT in comparison to TNT. The mechanical robustness of the apparatus could be approved in all runs. Pressure data were used to calculate the energy release of decomposition. The values were in good agreement with the heat of decomposition, estimated by DSC.

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“…Moreover, there is a need to separate the excitons that form close to the electrodes to avoid quenching processes that would hamper the photocurrent. 248,249 The C 70 analog (PC 70 BM) was also developed for these purposes. The organic active layer is a blend of a conductive polymer (acting as electron donor) and an electron acceptor characterized by an organic moiety.…”

Section: Solar Cellsmentioning

confidence: 99%