Photo-induced charge recombination kinetics in low bandgap PCPDTBT polymer:CdSe quantum dot bulk heterojunction solar cells

Albero, Josep; Zhou, Yun; Eck, Michael J.; Rauscher, Frank; Niyamakom, Phenwisa; Dumsch, Ines; Allard, Sybille; Scherf, Ullrich; Krüger, Michael; Palomares, Emilio

doi:10.1039/c1sc00514f

Cited by 24 publications

(30 citation statements)

References 33 publications

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“…These measurements are often used in research on BHJ solar cells [37][38][39] and dyes sensitized solar cells 40 , but have not previously been applied to interdigitated structures. The typical electrical characterization as current-voltage (J-V) is not enough to understand the solar cell limitations.…”

Section: Introductionmentioning

confidence: 99%

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells

Balderrama

Albero²,

Granero

et al. 2015

Nanoscale

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In this work interdigitated heterojunction photovoltaic devices were manufactured. A donor layer of P3HT nanopillars was fabricated by soft nanoimprinting using nanoporous anodic alumina templates. Subsequently, the PC70BM acceptor layer was deposited by spin coating on top of the P3HT nanopillars using a solvent that would not dissolve any of the previous material. Anisole solvent was used because it does not dissolve the bottom donor layer of nanopillars and provides a good wettability between the two materials. Charge extraction was used to determine the charge carrier densities n on the interdigitated heterojunction under operating conditions. Moreover, transient photovoltage measurements were used to find the recombination rate constant in combination with the charge carrier density. At the same time, the interdigitated structure was also compared with bulk heterojunction and bilayer solar cells manufactured with the same polymeric and fullerene materials in order to understand the recombination loss mechanisms in the ordered and disordered nanomorphologies of the active layers.

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Section: Introductionmentioning

confidence: 99%

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells

Balderrama

Albero²,

Granero

et al. 2015

Nanoscale

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“…The resulting device exhibited a maximum EQE of 55% and a certified PCE of 3.1%, with elimination of unwanted holes leakage into the cathode when a ZnO buffer layer was present . Using time‐resolved spectroscopic techniques, it was found that the carrier recombination dynamics depended strongly on the charge density and not on the electric field, a phenomenon that was related to the capping agents or the defects at the surface between the semiconductor nanocrystals and the polymer . Another electron‐withdrawing moiety, the thieno[3,4‐ c ]pyrrole‐4,6‐dione (TPD) unit, having a symmetrical, rigidly fused, and coplanar structure, is also beneficial for solar cells when it is incorporated in conjugated polymers .…”

Section: Photovoltaics Applicationmentioning

confidence: 99%

Conjugated Polymer/Nanocrystal Nanocomposites for Renewable Energy Applications in Photovoltaics and Photocatalysis

Lin

Hsu

et al. 2014

Small

101

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Conjugated polymer/nanocrystal composites have attracted much attention for use in renewable energy applications because of their versatile and synergistic optical and electronic properties. Upon absorbing photons, charge separation occurs in the nanocrystals, generating electrons and holes for photocurrent flow or reduction/oxidation (redox) reactions under proper conditions. Incorporating these nanocrystals into conjugated polymers can complement the visible light absorption range of the polymers for photovoltaics applications or allow the polymers to sensitize or immobilize the nanocrystals for photocatalysis. Here, the current developments of conjugated polymer/nanocrystal nanocomposites for bulk heterojunction-type photovoltaics incorporating Cd- and Pb-based nanocrystals or quantum dots are reviewed. The effects of manipulating the organic ligands and the concentration of the nanocrystal precursor, critical factors that affect the shape and aggregation of the nanocrystals, are also discussed. In the conclusion, the mechanisms through which conjugated polymers can sensitize semiconductor nanocrystals (TiO2 , ZnO) to ensure efficient charge separation, as well as how they can support immobilized nanocrystals for use in photocatalysis, are addressed.

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“…2 In the quest for higher efficiencies, major effort is being invested in developing new low-bandgap polymers to overcome the bandgap mismatch of poly(3-hexylthiophene) (P3HT) with respect to the optimum for solar energy harnessing. [4][5][6][7] Nowadays, research on novel acceptors arises due to the limited absorption of fullerene derivatives together with their inappropriate electronic bandgap for optimum solar harnessing and the high cost associated with the fullerene derivatives employed in high efficiency organic photovoltaics. 3 On the other hand, fullerene derivatives still remain the acceptor materials of choice in conjunction with both the traditional and the recently developed polymers.…”

Section: Introductionmentioning

confidence: 99%

Hybrid solution-processed bulk heterojunction solar cells based on bismuth sulfide nanocrystals

Martínez

Stavrinadis

Higuchi

et al. 2013

Phys. Chem. Chem. Phys.

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High efficiency organic and hybrid solar cells create demand for novel electron acceptor materials that possess appropriate energetic band levels and bandgap for efficient solar energy harnessing. We present hybrid bulk heterojunction devices based on P3HT and bismuth sulfide nanocrystals, a semiconductor based on environmentally friendly compounds, with a power conversion efficiency of 1% and NIR sensitization at 700 nm of 30%, among the highest ever reported for P3HT.

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Photo-induced charge recombination kinetics in low bandgap PCPDTBT polymer:CdSe quantum dot bulk heterojunction solar cells

Cited by 24 publications

References 33 publications

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells

Conjugated Polymer/Nanocrystal Nanocomposites for Renewable Energy Applications in Photovoltaics and Photocatalysis

Hybrid solution-processed bulk heterojunction solar cells based on bismuth sulfide nanocrystals

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Photo-induced charge recombination kinetics in low bandgap PCPDTBT polymer:CdSe quantum dot bulk heterojunction solar cells

Cited by 24 publications

References 33 publications

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC70BM solar cells

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC70BM solar cells

Conjugated Polymer/Nanocrystal Nanocomposites for Renewable Energy Applications in Photovoltaics and Photocatalysis

Hybrid solution-processed bulk heterojunction solar cells based on bismuth sulfide nanocrystals

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Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells

Design, fabrication and charge recombination analysis of an interdigitated heterojunction nanomorphology in P3HT/PC₇₀BM solar cells