Heterogeneous integration of InGaAs nanowires on the rear surface of Si solar cells for efficiency enhancement

Jae Cheol Shin; Parsian K. Mohseni; Ki Jun Yu; Stephanie Tomasulo; Kyle H. Montgomery; Minjoo L. Lee; John A. Rogers; Xiuling Li

doi:10.1021/nn304784y

Heterogeneous integration of InGaAs nanowires on the rear surface of Si solar cells for efficiency enhancement

Jae Cheol Shin, Parsian K. Mohseni, Ki Jun Yu, Stephanie Tomasulo, Kyle H. Montgomery, Minjoo L. Lee, John A. Rogers, Xiuling Li

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

We demonstrate energy-conversion-efficiency (η) enhancement of silicon (Si) solar cells by the heterogeneous integration of an In_xGa _1-xAs nanowire (NW) array on the rear surface. The NWs are grown via a catalyst-free, self-assembled method on Si(111) substrates using metalorganic chemical vapor deposition (MOCVD). Heavily p-doped In_xGa _1-xAs (x ≈ 0.7) NW arrays are utilized as not only back-reflectors but also low bandgap rear-point-contacts of the Si solar cells. External quantum efficiency of the hybrid In_xGa_1-xAs NW-Si solar cell is increased over the entire solar response wavelength range; and η is enhanced by 36% in comparison to Si solar cells processed under the same condition without the NWs.

Original language	English
Pages (from-to)	11074-11079
Number of pages	6
Journal	ACS Nano
Volume	6
Issue number	12
DOIs	https://doi.org/10.1021/nn304784y
Publication status	Published - 2012 Dec 21

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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10.1021/nn304784y

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title = "Heterogeneous integration of InGaAs nanowires on the rear surface of Si solar cells for efficiency enhancement",

abstract = "We demonstrate energy-conversion-efficiency (η) enhancement of silicon (Si) solar cells by the heterogeneous integration of an InxGa 1-xAs nanowire (NW) array on the rear surface. The NWs are grown via a catalyst-free, self-assembled method on Si(111) substrates using metalorganic chemical vapor deposition (MOCVD). Heavily p-doped InxGa 1-xAs (x ≈ 0.7) NW arrays are utilized as not only back-reflectors but also low bandgap rear-point-contacts of the Si solar cells. External quantum efficiency of the hybrid InxGa1-xAs NW-Si solar cell is increased over the entire solar response wavelength range; and η is enhanced by 36% in comparison to Si solar cells processed under the same condition without the NWs.",

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T1 - Heterogeneous integration of InGaAs nanowires on the rear surface of Si solar cells for efficiency enhancement

AU - Shin, Jae Cheol

AU - Mohseni, Parsian K.

AU - Yu, Ki Jun

AU - Tomasulo, Stephanie

AU - Montgomery, Kyle H.

AU - Lee, Minjoo L.

AU - Rogers, John A.

AU - Li, Xiuling

PY - 2012/12/21

Y1 - 2012/12/21

N2 - We demonstrate energy-conversion-efficiency (η) enhancement of silicon (Si) solar cells by the heterogeneous integration of an InxGa 1-xAs nanowire (NW) array on the rear surface. The NWs are grown via a catalyst-free, self-assembled method on Si(111) substrates using metalorganic chemical vapor deposition (MOCVD). Heavily p-doped InxGa 1-xAs (x ≈ 0.7) NW arrays are utilized as not only back-reflectors but also low bandgap rear-point-contacts of the Si solar cells. External quantum efficiency of the hybrid InxGa1-xAs NW-Si solar cell is increased over the entire solar response wavelength range; and η is enhanced by 36% in comparison to Si solar cells processed under the same condition without the NWs.

AB - We demonstrate energy-conversion-efficiency (η) enhancement of silicon (Si) solar cells by the heterogeneous integration of an InxGa 1-xAs nanowire (NW) array on the rear surface. The NWs are grown via a catalyst-free, self-assembled method on Si(111) substrates using metalorganic chemical vapor deposition (MOCVD). Heavily p-doped InxGa 1-xAs (x ≈ 0.7) NW arrays are utilized as not only back-reflectors but also low bandgap rear-point-contacts of the Si solar cells. External quantum efficiency of the hybrid InxGa1-xAs NW-Si solar cell is increased over the entire solar response wavelength range; and η is enhanced by 36% in comparison to Si solar cells processed under the same condition without the NWs.

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Heterogeneous integration of InGaAs nanowires on the rear surface of Si solar cells for efficiency enhancement

Abstract

All Science Journal Classification (ASJC) codes

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