Effect of dimethyl sulfoxide on the electrical properties of PEDOT:PSS/n-Si heterojunction diodes

Pathak, Chandra S.; Singh, J. P.; Singh, Rajendra

doi:10.1016/j.cap.2015.01.020

Cited by 45 publications

(36 citation statements)

References 29 publications

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“…However, the peak centered at 1,436 cm −1 was broadened and became more intense (Fig. 2(A), curve b) compared with the corresponding peak for the pristine film25 (Fig. 2(A), curve a).…”

Section: Resultsmentioning

confidence: 92%

Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

Saianand

Gopalan

et al. 2017

Sci Rep

103

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Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is most commonly used as an anode buffer layer in bulk-heterojunction (BHJ) polymer solar cells (PSCs). However, its hygroscopic and acidic nature contributes to the insufficient electrical conductivity, air stability and restricted photovoltaic (PV) performance for the fabricated PSCs. In this study, a new multifunctional additive, 2,3-dihydroxypyridine (DOH), has been used in the PEDOT: PSS buffer layer to obtain modified properties for PEDOT: PSS@DOH and achieve high PV performances. The electrical conductivity of PEDOT:PSS@DOH films was markedly improved compared with that of PEDOT:PSS. The PEDOT:PSS@DOH film exhibited excellent optical characteristics, appropriate work function alignment, and good surface properties in BHJ-PSCs. When a poly(3-hexylthiohpene):[6,6]-phenyl C61-butyric acid methyl ester blend system was applied as the photoactive layer, the power conversion efficiency of the resulting PSCs with PEDOT:PSS@DOH(1.0%) reached 3.49%, outperforming pristine PEDOT:PSS, exhibiting a power conversion enhancement of 20%. The device fabricated using PEDOT:PSS@DOH (1.0 wt%) also exhibited improved thermal and air stability. Our results also confirm that DOH, a basic pyridine derivative, facilitates adequate hydrogen bonding interactions with the sulfonic acid groups of PSS, induces the conformational transformation of PEDOT chains and contributes to the phase separation between PEDOT and PSS chains.

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“…However, the peak centered at 1,436 cm −1 was broadened and became more intense (Fig. 2(A), curve b) compared with the corresponding peak for the pristine film25 (Fig. 2(A), curve a).…”

Section: Resultsmentioning

confidence: 92%

Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

Saianand

Gopalan

et al. 2017

Sci Rep

103

View full text Add to dashboard Cite

show abstract

“…21,[23][24][25] This is the system of-choice in this work. 23,24 When the film thickness expands to a bulk system greater than 1 µm we see a similar rise of the electrical performance on the DMSO-concentration. In addition we modify the co-solvent presence between 0 and 10% of the original volume dispersion.…”

Section: Resultsmentioning

confidence: 99%

Local order drives the metallic state in PEDOT:PSS

et al. 2016

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Weak localization describes a metallic system, where due to the presence of disorder the electrical transport is governed by inelastic electron relaxation. Thereby the theory defines a threshold of spatial and of energetic disorder, at which a metal-insulator transition takes place. To achieve a metallic state in an inherently disordered system such as a conductive polymer, one has to overcome the threshold of localization. In this work we show that the effective suppression of disorder is possible in solution-processible poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate). We grow polymer films under optimized conditions allowing self-organization in solution. Interestingly, we find the requisite threshold, at which the system becomes finally metallic. We characterize the transition using a complementary morphology and magneto-electrical transport study and find coherent electron interactions, which emerge as soon as local order exceeds the macromolecular dimensions. These insights can be used for discrete improvement in the electrical performance, in particular for tailoring conductive polymers to alternative metal-like conductors.

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“…So far, great efforts have been devoted to improve the efficiency of the PEDOT:PSS/Si heterojunction solar cells. The current research is mainly focused on the interface engineering and surface modification including surface passivation, [13][14][15][16] field-effect passivation, 17,18 additive treatment of PEDOT:PSS, [19][20][21] and rear interfacial modifications with polymers 22,23 to improve the electrical properties of the solar cells. Although these strategies can effectively boost the power conversion efficiency (PCE) of the PEDOT:PSS/Si heterojunction solar cells, the optical reflection loss is still a crucial factor limiting the device performance.…”

Section: Introductionmentioning

confidence: 99%

Photon management effects of hybrid nanostructures/microstructures for organic-silicon heterojunction solar cells

Liu

Xuan

et al. 2018

Int J Energy Res

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Summary Photon management and carrier separation play crucial roles on designing highly efficient organic‐silicon heterojunction solar cells. Aiming at suppressing optical reflection loss and improving carrier separation efficiency simultaneously, in this paper, we experimentally fabricated hybrid nanostructured/microstructured surfaces by combining the advantages of microstructures and nanostructures. The hybrid nanostructured/microstructured surfaces were prepared by stacking nanoholes on the micropyramids via using a cost‐effective method. In terms of the optical properties, the light reflection, angle‐dependent light absorption, and polarization‐dependent light absorption of the different structured surfaces were investigated. The results indicated that the hybrid nanostructures/microstructures exhibited ultralow reflection in the broadband wavelength range of 300 to 1100 nm (average reflection is 1.8%). Meanwhile, the hybrid nanostructured/microstructured surfaces possessed superior omnidirectional and polarization‐independent properties compared to the unitary structures such as pyramid and nanohole. Furthermore, these different structured surfaces were simply used to fabricate the PEDOT:PSS/n‐Si heterojunction solar cells to show the electrical properties. It was found that the PEDOT:PSS/hybrid Si solar cells showed a PCE of 9.96%, which was greater than the PEDOT:PSS/pyramid Si and PEDOT:PSS/black Si solar cells, owing to the compromise among light absorption, junction area, and minority carrier lifetime. The present work will provide a promising way to fabricate high‐performance and low‐cost PEDOT:PSS/n‐Si heterojunction solar cells by using hybrid nanostructured/microstructured surfaces.

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Effect of dimethyl sulfoxide on the electrical properties of PEDOT:PSS/n-Si heterojunction diodes

Cited by 45 publications

References 29 publications

Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

Functional solid additive modified PEDOT:PSS as an anode buffer layer for enhanced photovoltaic performance and stability in polymer solar cells

Local order drives the metallic state in PEDOT:PSS

Photon management effects of hybrid nanostructures/microstructures for organic-silicon heterojunction solar cells

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