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Solution-processed germanium nanowire-positioned Schottky solar cells.

Yun JH, Park YC, Kim J, Lee HJ, Anderson WA, Park J - Nanoscale Res Lett (2011)

Bottom Line: Germanium nanowire (GeNW)-positioned Schottky solar cell was fabricated by a solution process.A GeNW-containing solution was spread out onto asymmetric metal electrodes to produce a rectifying current flow.This solution process may provide a route to the cost-effective nanostructure solar architecture.

View Article: PubMed Central - HTML - PubMed

Affiliation: Nano-Mechanical Systems Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon 305343, Korea. joonkim@kimm.re.kr.

ABSTRACT
Germanium nanowire (GeNW)-positioned Schottky solar cell was fabricated by a solution process. A GeNW-containing solution was spread out onto asymmetric metal electrodes to produce a rectifying current flow. Under one-sun illumination, the GeNW-positioned Schottky solar cell yields an open-circuit voltage of 177 mV and a short-circuit current of 19.2 nA. Schottky and ohmic contacts between a single GeNW and different metal electrodes were systematically investigated. This solution process may provide a route to the cost-effective nanostructure solar architecture.

No MeSH data available.


Schottky junction diode for single GeNW. (a) A schematic diagram of the three-pairs of Ti metal platforms. The solution containing GeNWs was dropped while the centrally located metal pairs were ac-biased to position the GeNWs in the designated location. (b) The configuration of the e-beam processed Al and Pt electrodes on the GeNW. (c) SEM image of the configuration. (d) An enlarged image of (c) showing the GeNW alternating contact with the Pt and Al electrodes.
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Figure 2: Schottky junction diode for single GeNW. (a) A schematic diagram of the three-pairs of Ti metal platforms. The solution containing GeNWs was dropped while the centrally located metal pairs were ac-biased to position the GeNWs in the designated location. (b) The configuration of the e-beam processed Al and Pt electrodes on the GeNW. (c) SEM image of the configuration. (d) An enlarged image of (c) showing the GeNW alternating contact with the Pt and Al electrodes.

Mentions: To obtain the electrical connection of a single GeNW, three-pairs of titanium (Ti) metal platforms were prepared by an optical lithography process, as depicted in Figure 2a. The single-pair of Ti electrodes was biased with an ac signal of 10 VP-P at 100 kHz, and then 2 μL of the GeNW-containing solution was dropped onto the electrode, thereby positioning the GeNWs in the designated location. Two different metal fingers of Pt and Al were then e-beam patterned and connected to Ti metal platforms. The configuration is presented in Figure 2b, and scanning electron microscope (SEM) images are shown in Figure 2c,d. A single GeNW was alternatively connected to Al and Pt finger electrodes. This feature provides three-different metal contacts to the GeNW. Homogeneous metal connections (Al-GeNW-Al or Pt-GeNW-Pt) and an asymmetric metal connection (Al-GeNW-Pt) were simultaneously formed.


Solution-processed germanium nanowire-positioned Schottky solar cells.

Yun JH, Park YC, Kim J, Lee HJ, Anderson WA, Park J - Nanoscale Res Lett (2011)

Schottky junction diode for single GeNW. (a) A schematic diagram of the three-pairs of Ti metal platforms. The solution containing GeNWs was dropped while the centrally located metal pairs were ac-biased to position the GeNWs in the designated location. (b) The configuration of the e-beam processed Al and Pt electrodes on the GeNW. (c) SEM image of the configuration. (d) An enlarged image of (c) showing the GeNW alternating contact with the Pt and Al electrodes.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211352&req=5

Figure 2: Schottky junction diode for single GeNW. (a) A schematic diagram of the three-pairs of Ti metal platforms. The solution containing GeNWs was dropped while the centrally located metal pairs were ac-biased to position the GeNWs in the designated location. (b) The configuration of the e-beam processed Al and Pt electrodes on the GeNW. (c) SEM image of the configuration. (d) An enlarged image of (c) showing the GeNW alternating contact with the Pt and Al electrodes.
Mentions: To obtain the electrical connection of a single GeNW, three-pairs of titanium (Ti) metal platforms were prepared by an optical lithography process, as depicted in Figure 2a. The single-pair of Ti electrodes was biased with an ac signal of 10 VP-P at 100 kHz, and then 2 μL of the GeNW-containing solution was dropped onto the electrode, thereby positioning the GeNWs in the designated location. Two different metal fingers of Pt and Al were then e-beam patterned and connected to Ti metal platforms. The configuration is presented in Figure 2b, and scanning electron microscope (SEM) images are shown in Figure 2c,d. A single GeNW was alternatively connected to Al and Pt finger electrodes. This feature provides three-different metal contacts to the GeNW. Homogeneous metal connections (Al-GeNW-Al or Pt-GeNW-Pt) and an asymmetric metal connection (Al-GeNW-Pt) were simultaneously formed.

Bottom Line: Germanium nanowire (GeNW)-positioned Schottky solar cell was fabricated by a solution process.A GeNW-containing solution was spread out onto asymmetric metal electrodes to produce a rectifying current flow.This solution process may provide a route to the cost-effective nanostructure solar architecture.

View Article: PubMed Central - HTML - PubMed

Affiliation: Nano-Mechanical Systems Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon 305343, Korea. joonkim@kimm.re.kr.

ABSTRACT
Germanium nanowire (GeNW)-positioned Schottky solar cell was fabricated by a solution process. A GeNW-containing solution was spread out onto asymmetric metal electrodes to produce a rectifying current flow. Under one-sun illumination, the GeNW-positioned Schottky solar cell yields an open-circuit voltage of 177 mV and a short-circuit current of 19.2 nA. Schottky and ohmic contacts between a single GeNW and different metal electrodes were systematically investigated. This solution process may provide a route to the cost-effective nanostructure solar architecture.

No MeSH data available.