Enhancement in photocurrent by dual-interface period-mismatched rotating rectangle grating-based c-Si solar cells

Ke Chen; Sheng Wu; Yingchun Yu; Nianhong Zheng; Rui Wu; Hongmei Zheng

doi:10.1364/AO.423690

Applied Optics
Vol. 60,
Issue 16,
pp. 4938-4947
(2021)
•https://doi.org/10.1364/AO.423690

Enhancement in photocurrent by dual-interface period-mismatched rotating rectangle grating-based c-Si solar cells

Ke Chen, Sheng Wu, Yingchun Yu, Nianhong Zheng, Rui Wu, and Hongmei Zheng

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Ke Chen, Sheng Wu, Yingchun Yu, Nianhong Zheng, Rui Wu, and Hongmei Zheng, "Enhancement in photocurrent by dual-interface period-mismatched rotating rectangle grating-based c-Si solar cells," Appl. Opt. 60, 4938-4947 (2021)

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Table of Contents Category
- Diffraction and Gratings
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About this Article
History
- Original Manuscript: February 25, 2021
- Revised Manuscript: April 13, 2021
- Manuscript Accepted: May 13, 2021
- Published: June 1, 2021

Abstract

A dual-interface period-mismatched rotating rectangular grating structure was designed for crystalline silicon thin film solar cells. The relevant parameters of the grating structures were optimized, and the absorption enhancement mechanisms were also explained by optoelectronic simulation analysis. The numerical results show that the rotating rectangular structure can improve the light-trapping performance by coupling light into the c-Si film to excite the waveguide mode and localized surface plasmon resonances. Moreover, it is found that the light-trapping effect of the rear grating rotating structure is better than that of the front grating rotating structure, because the rear interface can better excite localized surface plasmon resonances. The photocurrent density of the dual-interface period-mismatched rotating rectangular grating structure is increased to $18.01\; {\rm mA/cm}^2$, which is 76.05% higher than that of the planar 300 nm thick c-Si structure. The research results provide general guidance for the design of grating structures for thin-film solar cells.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Solar Cells	$Q_{1} = Q_{2}$ (nm)	$H$ (nm)	$R_{1}$ $(^{\circ})$	$R_{2}$ $(^{\circ})$	$ω_{d c 1} = ω_{d c 2}$	$J_{p h}$ $(m A / {c m}^{2})$
P-TFSC	-	-	-	-	-	11.12
Irr_DH-TFSC	330	140	0	70	0.2	17.82
Rot_DH-TFSC	330	100	40	0	0.2	16.17
Irr_DC-TFSC	330	100	0	0	0.2	15.68
Rot_DC-TFSC	330	120	30	30	0.8	18.22

Solar Cells	$Q_{1}$ (nm)	$m$	$H$ (nm)	$R_{1} = R_{2} (^{\circ})$	$ω_{d c 1}$	$ω_{d c 2}$	$J_{p h}$ ( $m A / {c m}^{2}$ )
Irr_DM-TFSC	330	1.5	120	0	0.4	0.2	16.60
Rot_DM-TFSC	310	2	120	22	0.8	0.4	20.55

		p region	i region	n region
Band parameters	$E_{g} (e V)$	1.1	1.1	1.1
	$N_{c}$ , $N_{v}$	$1.04 \times 1 0^{19}$ , $2.8 \times 1 0^{19}$	$1.04 \times 1 0^{19}$ , $2.8 \times 1 0^{19}$	$1.04 \times 1 0^{19}$ , $2.8 \times 1 0^{19}$
	$E$ , $χ (e V)$	11.7, 4.05	11.7, 4.05	11.7, 4.05
Boltzmann constant	$K_{B} (J / K)$	$1.38 \times 1 0^{- 23}$	$1.38 \times 1 0^{- 23}$	$1.38 \times 1 0^{- 23}$
Temperature	$T (K)$	300	300	300
Mobility	$μ_{n}$ , $μ_{p} ({c m}^{2} / V \cdot s)$	1450, 500	1450, 500	1450, 500
Doping	$N_{a}$ , $N_{d} (c m^{- 3})$	$1 \times 1 0^{20}$ , 0	$1 \times 1 0^{12}$ , 0	0, $1 \times 1 0^{20}$
Auger recombination rates	$C_{n}$ , $C_{p}$	$2.8 \times 1 0^{- 13}$ , $9.9 \times 1 0^{- 32}$	$2.8 \times 1 0^{- 13}$ , $9.9 \times 1 0^{- 32}$	$2.8 \times 1 0^{- 13}$ , $9.9 \times 1 0^{- 32}$

TFSCs	$J_{s c} (m A / {c m}^{2})$	$V_{o c} (m V)$
Planar	10.23	595
Irr_DH	16.31	608
Rot_DH	14.82	613
Irr_DC	14.26	612
Rot_DC	16.71	592
Irr_DM	15.05	614
Rot_DM	18.01	615

Solar Cells	$Q_{1} = Q_{2}$ (nm)	$H$ (nm)	$R_{1}$ $(^{\circ})$	$R_{2}$ $(^{\circ})$	$ω_{d c 1} = ω_{d c 2}$	$J_{p h}$ $(m A / {c m}^{2})$
P-TFSC	-	-	-	-	-	11.12
Irr_DH-TFSC	330	140	0	70	0.2	17.82
Rot_DH-TFSC	330	100	40	0	0.2	16.17
Irr_DC-TFSC	330	100	0	0	0.2	15.68
Rot_DC-TFSC	330	120	30	30	0.8	18.22

Abstract

Data Availability

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Tables (4)

Equations (11)

Applied Optics