The charge-transfer property and the performance of dye-sensitized solar cells of nitrogen doped zinc oxide

Zhang, Lingyun; Yang, Yang; Fan, Rongwei; Chen, Haiyan; Jia, Runping; Wang, Yonghui; Ma, Liqun; Wang, Yazhen

doi:10.1016/j.mseb.2012.04.026

Cited by 10 publications

(4 citation statements)

References 35 publications

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“…Figure 3 shows the variation of core-level XPS spectra of Zn 2p 3/2 and O 1s for the ZnO surfaces. [27] The middle peak (%531.1 eV) is usually attributed to the presence of loosely [28] including surface hydroxyl groups. [25] When the surface was treated with dye, the intensity of the Zn 2p 3/2 peak considerably decreased and the maximum peak position shifted toward a lower binding energy by about 0.1 eV, implying that Zn atoms were less exposed to the surface and bound to more surrounding O atoms.…”

Section: Resultsmentioning

confidence: 99%

“…The peak with the lowest binding energy ( % 530.1 eV) is generally assigned to O 2À ions surrounded by Zn atoms of ZnO crystals with a normal Wurzite structure, that is, bulk-phase oxygen. [27] The middle peak (%531.1 eV) is usually attributed to the presence of loosely [28] including surface hydroxyl groups. [27] The peak with the highest binding energy ( % 532.1 eV) is associated with O 2À ions in the oxygen vacant sites of the ZnO matrix.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Performance in Inverted Polymer Solar Cells with D–π–A‐Type Molecular Dye Incorporated on ZnO Buffer Layer

et al. 2013

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We report the superior characteristics of a ZnO buffer layer covered with a phenothiazine-based, π-conjugated donor-acceptor (D-π-A)-type organic dye (called "d-ZnO"). The use of this system for the performance enhancement of inverted bulk heterojunction polymer solar cells (PSCs) with the configuration of indium tin oxide/d-ZnO/polymer:PC71 BM/MoO3 /Ag (PC71 BM=[6,6]-phenyl C71 butyric acid methyl ester) is investigated. The layer of organic dyes anchored on the ZnO surface through carboxylate bonding reduces the shunt path on bare ZnO surface and provides better interfacial contacts and energy level alignments between the ZnO layer and the photoactive layer. This phenomenon consequently leads to highly enhanced photovoltaic parameters (fill factor, open-circuit voltage, and short-circuit current density) and power conversion efficiencies (PCEs). Inverted solar cells containing the d-ZnO layer not only revealed about 34% (PCE: 4.37%) and 18% (PCE: 7.11%) improvement in the PCEs of the representative poly-3(hexylthiophene) (P3HT) and low-band-gap poly{[4,8-bis-(2-ethyl-hexyl-thiophene-5-yl)-benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]-alt-[2-(2'-ethylhexanoyl)-thieno[3,4-b]thiophen-4,6-diyl]} (PBDTTT-C-T) polymer systems, respectively, but also showed 2-4 times longer device lifetimes than their counterparts without the organic dye layer. These results demonstrate that this simple approach used in inverted PSCs with a metal oxide buffer layer could become a promising procedure to fabricate highly efficient and stable PSCs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced Performance in Inverted Polymer Solar Cells with D–π–A‐Type Molecular Dye Incorporated on ZnO Buffer Layer

et al. 2013

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“…The performance improvement was also attributed to the combined effects of increase of charge carrier concentration and increase in Fermi energy level of nanorods after N doping. Zhang et al reported the fabrication of N‐doped ZnO using two methods, namely annealing and solution methods . N‐doped ZnO synthesized by using solution method ( η = 2.64%) showed better performance compared with annealing method ( η = 1.10%).…”

Section: Photo‐anodementioning

confidence: 99%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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Summary Dye‐sensitized solar cell (DSSC) attracts immense interest in the last few decades due to its various attractive features such as low production cost, ease of fabrication and relatively high conversion efficiency, which make it a strong competitor to the conventional silicon‐based solar cell. In DSSC, photo‐anode performs two important functions, viz. governs the collection and transportation of photo‐excited electrons from dye to external circuit as well as acts as a scaffold layer for dye adsorption. The photo‐anode usually consists of wide band gap semiconducting metal oxides such as titanium dioxide (TiO2) and zinc oxide (ZnO) deposited on the transparent conducting oxide substrates. The morphology and composition of the semiconductor oxides have significant impact on the DSSC photovoltaic performance. Therefore, enormous research efforts have been undertaken to investigate the influences of photo‐anode modifications on DSSC performance. The modifications can be classified into three categories, namely interfacial modification through the introduction of blocking and scattering layer, doping with non‐metallic anions and metallic cations and replacing the conventional mesoporous semiconducting metal oxide films with one‐dimensional or two‐dimensional nanostructures. In the present review, the previously mentioned modifications on photo‐anode are summarized based on the recent findings, with particular emphasis given to published works for the past 5 years. Copyright © 2017 John Wiley & Sons, Ltd.

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“…This peak BE is consistent with N bound to H. The second peak in NT1 sample, at higher BE, is due to accumulation of positive charge during the photoelectron ejection, as will be explained below, since the same effect is observed for Zn 2p and O 1s regions in this sample. The selected N source of ammonium acetate introduces NH 3 in the precursor solution [15,[39][40][41], which may induce the N H chemical bond in ZnO:N films prepared by SPT. Substrate temperature has a substantial role on the active N incorporation in the ZnO.…”

Section: Surface Chemical Compositionmentioning

confidence: 99%

Effect of substrate temperature on the properties of pyrolytically deposited nitrogen-doped zinc oxide thin films

Golshahi

Rozati

Rego

et al. 2013

Materials Science and Engineering: B

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The charge-transfer property and the performance of dye-sensitized solar cells of nitrogen doped zinc oxide

Cited by 10 publications

References 35 publications

Enhanced Performance in Inverted Polymer Solar Cells with D–π–A‐Type Molecular Dye Incorporated on ZnO Buffer Layer

Enhanced Performance in Inverted Polymer Solar Cells with D–π–A‐Type Molecular Dye Incorporated on ZnO Buffer Layer

Recent advances in photo-anode for dye-sensitized solar cells: a review

Effect of substrate temperature on the properties of pyrolytically deposited nitrogen-doped zinc oxide thin films

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