Annealing and thickness related performance and degradation of polymer solar cells

Zhao, Zengli; Rice, Lynn; Efstathiadis, Harry; Haldar, Pradeep

doi:10.1016/j.microrel.2012.08.002

Cited by 9 publications

(6 citation statements)

References 34 publications

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“…Domain size is affected by the P3HT-to-PCBM blend ratio, the solvent used, and postfabrication annealing. Annealing, such as thermal and/or solvent annealing, is usually applied to achieve the best photovoltaic performance . However, as mentioned earlier, long-term exposure to elevated temperatures (annealing) or aging can promote larger domains that result in poor device performance.…”

Section: Introductionmentioning

confidence: 99%

Comparative Aging Study of Organic Solar Cells Utilizing Polyaniline and PEDOT:PSS as Hole Transport Layers

Abdulrazzaq

Bourdo

Woo

et al. 2015

ACS Appl. Mater. Interfaces

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PSS-based cells exhibited faster degradation than PANI:CSA-based cells, where the average efficiency of six cells dropped to zero in less than one and a half years. On the other hand, PANI:CSA-based cells exhibited a much more stable performance with an average efficiency drop of only 15% of their initial values after one and a half years and 63% after two years. A single-diode model was utilized to fit the experimental data with the theoretical curve to extract the diode parameters, such as the ideality factor, to explain the effect of aging on the diode's performance.

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Section: Introductionmentioning

confidence: 99%

Comparative Aging Study of Organic Solar Cells Utilizing Polyaniline and PEDOT:PSS as Hole Transport Layers

Abdulrazzaq

Bourdo

Woo

et al. 2015

ACS Appl. Mater. Interfaces

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“…The V oc is known to be dependent on the energy level between the donor and the acceptor, which for the chosen polymer solar cell structure varies from 400 to about 600 mV, affected by thermal annealing, 3,[10][11][12] and is independent of the thickness of the active layer. 8,9 The V oc is independent of the roughness of the film, as well, for instance, for spray-on cells, the V oc of 580 mV has been reported for the cells fabricated at different process parameters. 35,36 Thus, the results of Fig.…”

Section: Resultsmentioning

confidence: 89%

“…Thermal annealing has been widely applied to solar cells with a D/A system of P3HT:PCBM to arrange the nanostructure properly and to improve the photovoltaic performance. 3,[8][9][10] The enhancement in photovoltaic performance has been attributed to the improvement made in the crystalline structure of P3HT, leading to higher hole mobility 11,12 and phase separation between P3HT and PCBM domains during thermal annealing. The optimal thermal annealing conditions vary with the film thickness and the ratio of P3HT to PCBM.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of highly reproducible polymer solar cells using ultrasonic substrate vibration posttreatment

2016

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"Fabrication of highly reproducible polymer solar cells using ultrasonic substrate vibration posttreatment," J. Photon. Energy 6(4), 045502 (2016), doi: 10.1117/1.JPE.6.045502. Abstract. Organic solar cells are usually nonreproducible due to the presence of defects in the structure of their constituting thin films. To minimize the density of pinholes and defects in PEDOT:PSS, which is the hole transporting layer of a standard polymer solar cell, i.e., glass/ ITO/PEDOT:PSS/P3HT:PCBM/Al, and to reduce scattering in device performance, wet spun-on PEDOT:PSS films are subjected to imposed ultrasonic substrate vibration posttreatment (SVPT). The imposed vibration improves the mixing and homogeneity of the wet spun-on films, and consequently the nanostructure of the ensuing thin solid films. For instance, our results show that by using the SVPT, which is a mechanical, single-step and low-cost process, the average power conversion efficiency of 14 identical cells increases by 25% and the standard deviation decreases by 22% indicating that the device photovoltaic performance becomes more consistent and significantly improved. This eliminates several tedious and expensive chemical and thermal treatments currently performed to improve the cell reproducibility. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…The PCE for the best-performing cells in Dispositions VI and VII decreased, respectively, from 0.688 to 0.076% (~90% decrease) and from 0.517 to 0.3832% (~26% decrease). This degradation in device performance with thermal treatment is attributed to (1) the thermally induced domain growth (hence, the possibility of unfavourable phase separation between rr-P3HT and PC61BM), (23,26−29) and (2) the possible deterioration of the electrical contact between the organic layer and aluminum electrode, which implies hindered charge transport and increased recombination, (28,29) resulting in the apparent reduction in short-circuit current. The poor thermal stability of the present OSCs may allow the low-temperature operation of electronic devices.…”

Section: Resultsmentioning

confidence: 99%

Optoelectronic Characteristics of rr-P3HT:PC61BM-based Organic Solar Cells

Ndabakuranye¹,

Lee²,

Kayijuka³

et al. 2020

Sensors and Materials

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It is well known that organic solar cells (OSCs) are made using organic materials because of their mechanical flexibility and low manufacturing cost. Their efficiency, however, remains low for several reasons, including limited light absorption and poor charge mobility. Although OSCs are a fascinating supplement to silicon-based solar cells, they have yet to provide good efficiency for a prolonged period. Combining a narrowband donor and an electron acceptor [regioregular poly 3-hexylthiohene-2,5-diyl (rr-P3HT) and 6,6-phenyl-C61-butyric acid methyl ester (PC61BM), respectively] is a prevalent approach towards efficient organic cells. In our work, a device of configuration indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):p olystyrene sulfonate (PEDOT:PSS)/rr-P3HT:PC61BM/Al was fabricated and characterized both electrically and optically. Various solar cell constraints were optimized to maximize the performance of OSCs. Ultimately, a device with a maximum power conversion efficiency (PCE) of approximately 1.4% was achieved under the optimum fabrication conditions.

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Annealing and thickness related performance and degradation of polymer solar cells

Cited by 9 publications

References 34 publications

Comparative Aging Study of Organic Solar Cells Utilizing Polyaniline and PEDOT:PSS as Hole Transport Layers

Comparative Aging Study of Organic Solar Cells Utilizing Polyaniline and PEDOT:PSS as Hole Transport Layers

Fabrication of highly reproducible polymer solar cells using ultrasonic substrate vibration posttreatment

Optoelectronic Characteristics of rr-P3HT:PC61BM-based Organic Solar Cells

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