High performance organic photovoltaic cells with blade-coated active layers

Lim, Siew-Lay; Chen, En-Chen; Chen, Chun-Yu; Ong, Kok-Haw; Chen, Zhi-Kuan; Meng, Hsin‐Fei

doi:10.1016/j.solmat.2012.06.049

Cited by 41 publications

(15 citation statements)

References 25 publications

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“…The high PCEs achieved with devices based on blends of electron-donating and electron-accepting materials require fine control of thin film phase separation on the nanometer scale which leads to increased number of interfaces where exciton dissociation and charge generation occurs [15]. The resulting film morphology strongly depends on several processing parameters [16] including the solubility of the materials in the solvent used [17], the interaction with the substrate surface [18] the packing of the molecules, formation of domains of different blend compositions [19] and the film deposition technique [20]. It has been established that exciton dissociation can be maximized when donor and acceptor components are intimately mixed and the length-scale of the phase separation is in the range of the exciton diffusion length [15,21].…”

Section: Introductionmentioning

confidence: 99%

Charge transport model for photovoltaic devices based on printed polymer: Fullerene nanoparticles

Yamamoto

Payne

Koehler

et al. 2015

Solar Energy Materials and Solar Cells

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a b s t r a c tThe electrical transport properties of films derived from aqueous semiconducting nanoparticle are fully described by a phenomenological model that relates intrinsic film morphology to photovoltaic response. The model is applied to a new bulk heterojunction blend, composed of organic semiconducting nanoparticles formed from the polymer donor poly[{2,6-(4,8-didodecylbenzo[1,2-b:4,5-b']dithiophene)}-alt-{5,5-(2,5-bis(2-butyloctyl)-3,6-dithiophen-2-yl-2,5dihydropyrrolo[3,4-c]57pyrrole-1,4-dione)}] (P(TBT-DPP)) and the fullerene indene-C 60 -bisadduct (ICBA) synthesized by the miniemulsion method. The nanoparticle inks are printed from an aqueous dispersion onto flexible ITO-free substrates yielding power conversion efficiency of 2.6%.

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Section: Introductionmentioning

confidence: 99%

Charge transport model for photovoltaic devices based on printed polymer: Fullerene nanoparticles

Yamamoto

Payne

Koehler

et al. 2015

Solar Energy Materials and Solar Cells

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“…The details were similar to blade coating of organic layers and were reported elsewhere. [16][17][18][19][20][21][22][23] Smooth and uniform IGZO film can be obtained from blade speed below certain values. 24 In FIG.…”

Section: A Device Performancementioning

confidence: 99%

Blade-coated sol-gel indium-gallium-zinc-oxide for inverted polymer solar cell

et al. 2016

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The inverted organic solar cell was fabricated by using sol-gel indium-gallium-zinc-oxide (IGZO) as the electron-transport layer. The IGZO precursor solution was deposited by blade coating with simultaneous substrate heating at 120 °C from the bottom and hot wind from above. Uniform IGZO film of around 30 nm was formed after annealing at 400 °C. Using the blend of low band-gap polymer poly[(4,8-bis-(2-ethylhexyloxy)-benzo(1,2-b:4,5-b’)dithiophene)-2,6-diyl-alt- (4-(2-ethylhexanoyl)-thieno [3,4-b]thiophene-)-2-6-diyl)] (PBDTTT-C-T) and [6,6]-Phenyl C71 butyric acid methyl ester ([70]PCBM) as the active layer for the inverted organic solar cell, an efficiency of 6.2% was achieved with a blade speed of 180 mm/s for the IGZO. The efficiency of the inverted organic solar cells was found to depend on the coating speed of the IGZO films, which was attributed to the change in the concentration of surface OH groups. Compared to organic solar cells of conventional structure using PBDTTT-C-T: [70]PCBM as active layer, the inverted organic solar cells showed significant improvement in thermal stability. In addition, the chemical composition, as well as the work function of the IGZO film at the surface and inside can be tuned by the blade speed, which may find applications in other areas like thin-film transistors.

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“…Until now, relatively few works developed toward the target of commercialization because of the performance reduction of PSCs devices fabricated by large-area process. There have existed several coating or printable processes used for large-area PSC fabrication, such as spray coating [3,4], ink-jet printing [5,6] and roll-to-roll (R2R) processes, doctor-blade coating [7], screen printing [8] and slot-die coating [9][10][11][12][13][14][15][16][17][18][19][20]. Among these processes, slot-die coating is the most potential candidate for the large-area and solution-processed process toward commercialization currently.…”

Section: Introductionmentioning

confidence: 99%