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Polymer Photovoltaic Cells with Rhenium Oxide as Anode Interlayer.

Wei J, Bai D, Yang L - PLoS ONE (2015)

Bottom Line: It is found that insertion of ReO3 interfacial layer results in the decreased performance for P3HT: PCBM based solar cells.The results indicated the fact that a portion of ReO3 decomposed during thermal evaporation process, resulting in the formation of a buffer layer with a lower work function.As a consequence, a higher energy barrier was generated between the ITO and the active layer.

View Article: PubMed Central - PubMed

Affiliation: School of Management, Tianjin University of Technology, Tianjin, China.

ABSTRACT
The effect of a new transition metal oxide, rhenium oxide (ReO3), on the performance of polymer solar cells based on regioregular poly(3-hexylthiophene) (P3HT) and methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend as buffer layer was investigated. The effect of the thickness of ReO3 layer on electrical characteristics of the polymer solar cells was studied. It is found that insertion of ReO3 interfacial layer results in the decreased performance for P3HT: PCBM based solar cells. In order to further explore the mechanism of the decreasing of the open-circuit voltage (Voc), the X-ray photoelectron spectroscopy (XPS) is used to investigate the ReO3 oxidation states. Kelvin Probe method showed that the work function of the ReO3 is estimated to be 5.13eV after thermal evaporation. The results indicated the fact that a portion of ReO3 decomposed during thermal evaporation process, resulting in the formation of a buffer layer with a lower work function. As a consequence, a higher energy barrier was generated between the ITO and the active layer.

No MeSH data available.


TGA plots of ReO3 (A) and ReO3 (C) with a heating rate of 10°C/min under inert atmosphere.
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pone.0133725.g005: TGA plots of ReO3 (A) and ReO3 (C) with a heating rate of 10°C/min under inert atmosphere.

Mentions: Thermogravimetric analysis (TGA) is also used to investigate the thermal evaporated ReO3. Fig 5 shows the TGA results of ReO3 (a) and ReO3 (c), respectively. The TGA analysis reveals that under inert atmosphere, the onset decomposition temperature (Td, 5% weight loss) for ReO3 (a) and ReO3 (c) were 452 and 423°C, respectively. After that rapid weight loss is observed. It implies that some reactions were taken place during thermal evaporation process. All evidences indicated that ReO3 with poor thermal stability is not adequate as potential anode buffer layer for the fabrication process of organic photovoltaic devices.


Polymer Photovoltaic Cells with Rhenium Oxide as Anode Interlayer.

Wei J, Bai D, Yang L - PLoS ONE (2015)

TGA plots of ReO3 (A) and ReO3 (C) with a heating rate of 10°C/min under inert atmosphere.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4520519&req=5

pone.0133725.g005: TGA plots of ReO3 (A) and ReO3 (C) with a heating rate of 10°C/min under inert atmosphere.
Mentions: Thermogravimetric analysis (TGA) is also used to investigate the thermal evaporated ReO3. Fig 5 shows the TGA results of ReO3 (a) and ReO3 (c), respectively. The TGA analysis reveals that under inert atmosphere, the onset decomposition temperature (Td, 5% weight loss) for ReO3 (a) and ReO3 (c) were 452 and 423°C, respectively. After that rapid weight loss is observed. It implies that some reactions were taken place during thermal evaporation process. All evidences indicated that ReO3 with poor thermal stability is not adequate as potential anode buffer layer for the fabrication process of organic photovoltaic devices.

Bottom Line: It is found that insertion of ReO3 interfacial layer results in the decreased performance for P3HT: PCBM based solar cells.The results indicated the fact that a portion of ReO3 decomposed during thermal evaporation process, resulting in the formation of a buffer layer with a lower work function.As a consequence, a higher energy barrier was generated between the ITO and the active layer.

View Article: PubMed Central - PubMed

Affiliation: School of Management, Tianjin University of Technology, Tianjin, China.

ABSTRACT
The effect of a new transition metal oxide, rhenium oxide (ReO3), on the performance of polymer solar cells based on regioregular poly(3-hexylthiophene) (P3HT) and methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend as buffer layer was investigated. The effect of the thickness of ReO3 layer on electrical characteristics of the polymer solar cells was studied. It is found that insertion of ReO3 interfacial layer results in the decreased performance for P3HT: PCBM based solar cells. In order to further explore the mechanism of the decreasing of the open-circuit voltage (Voc), the X-ray photoelectron spectroscopy (XPS) is used to investigate the ReO3 oxidation states. Kelvin Probe method showed that the work function of the ReO3 is estimated to be 5.13eV after thermal evaporation. The results indicated the fact that a portion of ReO3 decomposed during thermal evaporation process, resulting in the formation of a buffer layer with a lower work function. As a consequence, a higher energy barrier was generated between the ITO and the active layer.

No MeSH data available.