Enhancement of the photovoltaic performance in P3HT: PbS hybrid solar cells using small size PbS quantum dots

Firdaus, Yuliar; Vandenplas, Erwin; Justo, Yolanda; Gehlhaar, Robert; Cheyns, David; Hens, Zeger; Auweraer, Mark Van der

doi:10.1063/1.4894404

Cited by 29 publications

(39 citation statements)

References 44 publications

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“…At the time of the manuscript submission a paper by Firdaus et al has reported similar results with PbS QDs passivated by a benzenedithiol ligand. While this work reports a larger J SC , devices have a smaller FF .…”

Section: Discussionmentioning

confidence: 59%

PbS nanocrystals in hybrid systems for solar cell applications

Borriello

Bruno

Diana

et al. 2014

Phys. Status Solidi A

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Many research efforts are focused toward significant improvements of polymeric solar cells efficiency, energy harvesting range, time, and environmental stability. Particular attention is given to hybrid organic/inorganic composites constituted of polymer/lead chalcogenides (PbS and PbSe) nanocrystals (NCs) to extend the spectral sensitivity of cells to near‐infrared wavelengths. In this work we report the synthesis and characterization of PbS nanocrystals with absorption edge at 984 nm. The nanocrystals have a cubic crystal structure and size of about 2 nm as found by X‐ray diffraction analysis. They were combined with poly(3‐hexylthiophene) (P3HT) polymer to obtain P3HT:PbS blends with different PbS loadings. A post‐deposition ligand exchange on PbS NCs by 1,2‐ethanedithiol (EDT) allowed a better interaction between polymer and nanocrystals as showed by fluorescence measurements. The P3HT:PbS blends were deposited and treated by a layer by layer spin coating process and used as active layer in solar cells having structure glass/ITO/PEDOT:PSS/blend/Al. The major result obtained for this hybrid system is an increase of PCE by about two orders of magnitude with respect to analogous reported cells where a post‐deposition ligand exchange was performed.

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Section: Discussionmentioning

confidence: 59%

PbS nanocrystals in hybrid systems for solar cell applications

Borriello

Bruno

Diana

et al. 2014

Phys. Status Solidi A

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“…Fig. 6 shows the room temperature intensity indicating efficient dynamics of exciton dissociation and subsequent hole transfer from the PbS NCs to the P3HT matrix before recombination [9,19]. The charge transfer is favoured due to the electron affinity difference between P3HT (À3.0 eV) and PbS (À3.8 eV).…”

Section: Elementmentioning

confidence: 96%

“…Overall photogenerated excitons increase and as a result the short circuit current density increases. The electron affinities of P3HT and PbS are À3.0 eV and À3.8 eV respectively, hence it is energetically favorable for electron transfer from P3HT to PbS and hole transfer from PbS to P3HT [9,26] as indicated in Fig. 7.…”

Section: Elementmentioning

confidence: 99%

“…In another recent report [9] commercially available PbS QDs of different sizes (Evident Technologies) capped with oleic acid (OLA) and different approaches of surface modification of these QDs; viz., solution phase (octylamine, octanethiol) and post-deposition (acetic acid, 1,4-benzenedithiol) ligand exchange were used. Replacing OLA by shorter chain ligands improved the performance of the hybrid solar cells.…”

Section: Introductionmentioning

confidence: 99%

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Study of surfactant-free lead sulfide nanocrystals-P3HT hybrid polymer solar cells

Alam

Kumar

Dutta

2015

Organic Electronics

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“…For these reasons, the HOISC's properties depend strongly on the inorganic nanostructures, due to the carriers' interchange, geometry, composition and the absorption edge of the nanostructures used [2]. There are a lot of potential inorganic compounds suitable for HOISC, but metal oxides and chalcogenides are the most studied because of their appropriate optical properties [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%