Lengthening the polymer solidification time to improve the performance of polymer/ZnO nanorod hybrid solar cells

Chou, Chuen‐Shii; Huang, Jing-Shun; Wu, Chengzhi; Lee, Chun‐Yu; Lin, Ching−Fuh

doi:10.1016/j.solmat.2009.04.016

Cited by 61 publications

(26 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nanostructures of ZnO such as ZnO nanorods and nanowires have received increased attention due to their excellent electrical and optical properties [3]. Due to the high surface-to-volume ratio provided by the one-dimensional (1D) nanostructure, ZnO nanorod arrays are considered suitable to the application for hybrid photovoltaic devices [4][5][6][7]. In the past few years, ZnO nanorods have been synthesized via various physical and chemical methods including vapor phase synthesis [8][9][10], metalorganic chemical vapor deposition (MOCVD) [11][12][13], and solution-based synthesis [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…An example of such a hybrid solar cell is the one with ZnO nanorod arrays coated on ITO-coated glass substrates and they found that nanorods play an important role in improving electron transport speed [4][5][6][7]. In addition, it will be an innovation to build plastic hybrid solar cells [19] consisting of ZnO nanorods and conjugated polymer on ITO/PET substrates since plastic materials are cheap, lightweight, bendable, and suitable to large-scale roll-to-roll manufacturing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Growth of ZnO Nanorod Arrays on Flexible Substrates: Effect of Precursor Solution Concentration

et al. 2012

View full text Add to dashboard Cite

We report a low-temperature aqueous solution growth of uniformly aligned ZnO nanorod arrays on flexible substrates. The substrate is Indium Tin Oxide (ITO) film coated on polyethylene terephthalate (PET). Solutions with five different concentrations of the precursors with equimolar Zinc Nitrate and Hexamethylenetetramine (HMT) in distilled water were prepared to systematically study the effect of precursor solution concentration on the structural and optical properties of ZnO nanorods. It was concluded that the precursor concentration have great influence on the morphology, crystal quality, and optical property of ZnO nanorods. The diameter, density, and orientation of the nanorods are dependent on the precursor solution concentration. X-ray diffraction and micro-Raman spectroscopy showed that the ZnO nanorods with the highest concentration of 50 mM were highly aligned and have the highest level of surface coverage. It was also found that the diameter and length of the nanorods increases upon increasing precursor solution concentration. This is the first systematic investigation of studying the effect of precursor solution concentration on the quality of ZnO nanorods grown on ITO/PET substrates by low-temperature solution method. We believe that our work will contribute to the realization of flexible organic-inorganic hybrid solar cell based on ZnO nanorods and conjugated polymer.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth of ZnO Nanorod Arrays on Flexible Substrates: Effect of Precursor Solution Concentration

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Chou demonstrated that the poor infiltration of the polymer causes reduced J sc and FF of the ZnO nanorod/organic hybrid solar cell. 29 In our experimental result, cross sectional views of ZnO nanorod structures in Figs. 4(a)-(c) indicate that the P3HT:PC 61 BM layer was not infiltrated in the ZnO nanorod at the slow rotation speed of spin coating process, corresponding to the high density of ZnO nanorods.…”

Section: (C)mentioning

confidence: 69%

Inverted Organic Photovoltaic Cell with ZnO Nanorod Structure

Fukuda

Uratani

2017

Electrochemistry

View full text Add to dashboard Cite

The electrical and physical properties at the interface between the ZnO electron transport/collection layer and an organic photoactive layer play important roles in determining photovoltaic performance. Therefore, we have fabricated ZnO nanorods and optimized the coating conditions used for deposition of the ZnO seed layer, which serves as a nucleation site for crystal growth. First, the relationship between the concentration of the ZnO precursor solution (zinc acetate dihydrate and hexamethylenetetramine in methanol) and diameter of the ZnO nanorods was examined, and we showed that the diameter continuously decreased with increasing concentration, reaching a minimum of 23 nm. Further, we investigated density of ZnO nanorods and photovoltaic performance of the inverted cell as a function of the rotation speed used during the spin coating process to deposit the ZnO seed layer. A low density of ZnO nanorods was obtained when the rotation speed was low, and this caused the short circuit current density, open circuit voltage, and fill factor of the organic photovoltaics to decrease. As a result, a maximum photoconversion efficiency of 3.0% was achieved, and this value was 1.6-fold greater than that measured using a reference device containing no ZnO nanorods (photoconversion efficiency: 1.9%).

show abstract

“…Previously, P3HT processing parameters such as solvent selection and thermal annealing have been found to markedly affect the infiltration of P3HT, thereby the photovoltaic performance of the devices [4]. Besides ZnO NRAs/P3HT-based solar cells, other polymer deposition parameters such as solution concentration and spin coating speed have been studied for polymer/fullerene blend-based inverted type hybrid OSCs [6,12]. Takanezawa et al [6] showed that thicker polymer/fullerene layer deposited by using higher solution concentration or lower spin coating speed resulted in better power conversion efficiency (PCE) as a consequence of improved optical absorption even though the fill factor (FF) dropped slightly due to higher hole transportation resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Takanezawa et al [6] showed that thicker polymer/fullerene layer deposited by using higher solution concentration or lower spin coating speed resulted in better power conversion efficiency (PCE) as a consequence of improved optical absorption even though the fill factor (FF) dropped slightly due to higher hole transportation resistance. In addition, Chou et al [12] verified that lowering the spin coating speed could lenghthen the polymer/fullerene layer drying time, hence leading to improved PCE as a result of better polymer crystallinity, increased thickness, and enhanced infiltration of polymer/fullerene layer. It is anticipated that by manipulating the P3HT solution concentration and its spin coating speed, the infiltration of P3HT and the thickness can be optimized to achieve better photovoltaic performance in ZnO NRAs/ P3HT-based solar cells.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the performance of inverted type hybrid organic solar cell based on ZnO/P3HT with various polymer deposition parameters

Sabri

Yap

Yahaya

et al. 2016

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Various polymer deposition parameters have been investigated to improve the overall performance of the inverted type hybrid organic solar cells based on zinc oxide (ZnO)/poly(3-hexylthiophene) (P3HT). The polymer was deposited onto fluorine-doped tin oxide/ZnO nanorod arrays (NRAs) substrates via spin coating technique and followed by deposition of silver (Ag) using electron gun evaporation technique to build the devices. The objective of this work is to achieve the optimum device performance by selecting the best polymer concentration (25-40 mg/ml), spin coating speed (500-2000 rpm) and diluted polymer concentration (1-4 mg/ml) for ZnO NRAs surface modification. Experimental results showed that the device with P3HT concentration of 35 mg/ml, spin coating speed of 1000 rpm and ZnO NRAs surface modification with 1 mg/ml diluted P3HT solution exhibited the highest power conversion efficiency of 0.27 %. The surface roughness, P3HT top layer thickness and P3HT infiltration contributed to the significant photovoltaic performance improvement.

show abstract

Lengthening the polymer solidification time to improve the performance of polymer/ZnO nanorod hybrid solar cells

Cited by 61 publications

References 32 publications

Growth of ZnO Nanorod Arrays on Flexible Substrates: Effect of Precursor Solution Concentration

Growth of ZnO Nanorod Arrays on Flexible Substrates: Effect of Precursor Solution Concentration

Inverted Organic Photovoltaic Cell with ZnO Nanorod Structure

Optimizing the performance of inverted type hybrid organic solar cell based on ZnO/P3HT with various polymer deposition parameters

Contact Info

Product

Resources

About