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. 2018 Feb 14;13(1):53.
doi: 10.1186/s11671-018-2462-0.

High Performance of PEDOT:PSS/n-Si Solar Cells Based on Textured Surface with AgNWs Electrodes

Xiangyu Jiang  1   2 , Pengbo Zhang  1   2   3 , Juan Zhang  4 , Jilei Wang  4 , Gaofei Li  4 , Xiaohong Fang  5   6 , Liyou Yang  1   4 , Xiaoyuan Chen  1   2   3
Affiliations

High Performance of PEDOT:PSS/n-Si Solar Cells Based on Textured Surface with AgNWs Electrodes

Xiangyu Jiang et al. Nanoscale Res Lett. .

Abstract

Hybrid heterojunction solar cells (HHSCs) have gained extensive research and attention due to simple device structure and low-cost technological processes. Here, HHSCs are presented based on a highly transparent conductive polymer poly(3,4ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) directly spin-coated on an n-type crystalline silicon with microscale surface textures, which are prepared by traditional chemical etching. We have studied interface properties between PEDOT:PSS and textured n-Si by varying coating conditions. Final power conversion efficiency (PCE) could arrive at 8.54% by these simple solution-based fabrication processes. The high conversion efficiency is attributed to the fully conformal contact between PEDOT:PSS film and textured silicon. Furthermore, the reflectance of the PEDOT:PSS layer on textured surface is analyzed by changing film thickness. In order to improve the performance of the device, silver nanowires were employed as electrodes because of its better optical transmittance and electrical conductivity. The highest PCE of 11.07% was achieved which displayed a 29.6% enhancement compared with traditional silver electrodes. These findings imply that the combination of PEDOT:PSS film and silver nanowire transparent electrodes pave a promising way for realizing high-efficiency and low-cost solar cells.

Keywords: Drop-casting; N-Si solar cells; PEDOT:PSS; Silver nanowires.

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Competing Interests

The authors declare that they have no competing interests.

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Figures

Fig. 1
Fig. 1
Schematic of preparing the n-Si/PEDOT:PSS solar cells with (a-f) Ag grid electrodes or (a-e, g) silver nanowires electrodes
Fig. 2
Fig. 2
The contact angle between wafer and PEDOT:PSS solution (a) without FS31 and (b) with FS31
Fig. 3
Fig. 3
The red line is the absorbance spectrum of PEDOT:PSS with additives(DMSO and FS31) at wavelength from 400 to 1000 nm. The blue lines are the transmittance spectra of PEDOT:PSS film with and without additives and reference glass at wavelength from 400 to 1000 nm, respectively
Fig. 4
Fig. 4
The SEM top view images of textured Si with PEDOT:PSS layer. a–e coating rates range from 1000 to 5000 rpm, and f has no PEDOT:PSS layer. The scale bars in a–f are the same
Fig. 5
Fig. 5
The cross-sectional view of textured Si coated PEDOT:PSS film (a) with 4000 rpm and (b) with 5000 rpm
Fig. 6
Fig. 6
The reflectance curves of textured Si coated with PEDOT:PSS layer at different coating rates from 1000 to 5000 rpm, 8000 rpm, and no PEDOT:PSS
Fig. 7
Fig. 7
The J-V curves of the HHSCs with different PEDOT:PSS coating rates from 1000 to 5000 rpm and 8000 rpm at AM1.5
Fig. 8
Fig. 8
J–V curves of PEDOT:PSS/n-Si hybrid solar cells with silver nanowire electrodes
Fig. 9
Fig. 9
a The cross-sectional view of PEDOT:PSS/n-Si solar cells with AgNWs electrodes. b The detailed image of red rectangle
See this image and copyright information in PMC

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