Comparison of ZnO interlayers in inverted bulk heterojunction solar cells

Bekci, D. Rana; Karsli, Adem; Cakır, A. Cagatay; Sarica, Hizir; Guloglu, Alper; Güneş, Serap; Erten-Ela, Şule

doi:10.1016/j.apenergy.2012.02.077

Cited by 17 publications

(3 citation statements)

References 36 publications

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“…Efficient charge collection at the electrodes of inverted bulk heterojunction solar cells is crucial for ensuring high efficiency [10]. Many inorganic materials—especially metal oxides such as TiO 2 [11,12], SnO 2 and ZnO [13,14]—were successfully used as the HBL in inverted BHJ solar cells due to the high electron mobility and optical transparency of these semiconductor materials.…”

Section: Introductionmentioning

confidence: 99%

Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

et al. 2019

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In this work, chemical bath-deposited cadmium sulfide (CdS) thin films were employed as an alternative hole-blocking layer for inverted poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction solar cells. CdS films were deposited by chemical bath deposition and their thicknesses were successfully controlled by tailoring the deposition time. The influence of the CdS layer thickness on the performance of P3HT:PCBM solar cells was systematically studied. The short circuit current densities and power conversion efficiencies of P3HT:PCBM solar cells strongly increased until the thickness of the CdS layer was increased to ~70 nm. This was attributed to the suppression of the interfacial charge recombination by the CdS layer, which is consistent with the lower dark current found with the increased CdS layer thickness. A further increase of the CdS layer thickness resulted in a lower short circuit current density due to strong absorption of the CdS layer as evidenced by UV-Vis optical studies. Both the fill factor and open circuit voltage of the solar cells with a CdS layer thickness less than ~50 nm were comparatively lower, and this could be attributed to the effect of pin holes in the CdS film, which reduces the series resistance and increases the charge recombination. Under AM 1.5 illumination (100 mW/cm2) conditions, the optimized PCBM:P3HT solar cells with a chemical bath deposited a CdS layer of thickness 70 nm and showed 50% power conversion efficiency enhancement, in comparison with similar solar cells with optimized dense TiO2 of 50 nm thickness prepared by spray pyrolysis.

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Section: Introductionmentioning

confidence: 99%

Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

et al. 2019

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“…In conventional cell architecture, the ZnO interlayer as an optical spacer and hole blocking provides improvement of current density and performance as a result of redistribution of the optical electric field and blocking holes, and also creates an extra donor-acceptor interface. The use of ZnO provides several important advantages, as it acts as a shielding layer which protects the active layer from oxygen and humidity, and it can be deposited from the solution onto the active layer without any effect [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Vacuum-free processed bulk heterojunction solar cells with E-GaIn cathode as an alternative to Al electrode

Ongül

Yuksel

Bozar

et al. 2015

J. Phys. D: Appl. Phys.

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In this paper, the photovoltaic characteristics of bulk heterojunction solar cells employing an eutectic gallium-indium (EGaIn) alloy as a top metal contact which was coated by a simple and inexpensive brush-painting was investigated. The overall solar cell fabrication procedure was vacuum-free. As references, regular organic bulk heterojunction solar cells employing thermally evaporated Aluminum as a top metal contact were also fabricated. Inserting the ZnO layer between the active layer and the cathode electrodes (Al and EGaIn) improved the photovoltaic performance of the herein investigated devices. The power conversion efficiencies with and without EGaIn top electrodes were rather comparable. Hence, we have shown that the EGaIn, which is liquid at room temperature, can be used as a cathode. It allows an easy and rapid device fabrication that can be implemented through a vacuum free process.

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“…One of the important keys to high performance organic solar cell, the selection of the buffer layer as electron collector is crucial [6]. One of the most studied buffer layer, zinc oxide (ZnO) has been demonstrated to be an effective electron collection material in inverted organic solar cell [6][7][8]. With good transparency and high electron mobility, ZnO continuously becomes an attractive material because of various nanostructures that can be easily attained by solution processing for more efficient carrier extraction and transport.…”

Section: Introductionmentioning

confidence: 99%

Performance of P3HT:PCBM Organic Solar Cell with ZnO Buffer Layer

Alias

Kamaruddin

Ani

et al. 2014

AMR

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In this paper, we explore the characteristics of bulk heterojunction solar cell based on poly (3-hexyl thiophene) [P3HT] and [6,6]-phenyl-C61-butyric acid methyl ester [PCBM] by introducing a buffer layer with device configuration of ITO/ZnO/P3HT:PCBM/Au. Nanostructured ZnO with individual diameter around 20-50 nm was used as the buffer layer and its effects on the short circuit current density, Jsc and open circuit voltage, Voc were investigated. It was found that, the electrical characteristic of the organic solar cell was obviously changed by introducing the buffer layer. Solar cell characteristic with Voc of 0.3939 V was obtained but the Jsc was very small. The surface topology of the P3HT:PCBM was investigated using an atomic force microscopy (AFM). ZnO nanoparticles were observed using a field emission scanning electron microscope (FESEM) and the electrical properties of the solar cell was measured using a solar simulator with a current – voltage (I-V) measurement system.

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Comparison of ZnO interlayers in inverted bulk heterojunction solar cells

Cited by 17 publications

References 36 publications

Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

Vacuum-free processed bulk heterojunction solar cells with E-GaIn cathode as an alternative to Al electrode

Performance of P3HT:PCBM Organic Solar Cell with ZnO Buffer Layer

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