Methyl/Allyl Monolayer on Silicon: Efficient Surface Passivation for Silicon-Conjugated Polymer Hybrid Solar Cell

被引：80

作者：

Zhang, Fute ^{[1
]}

Liu, Dong ^{[1
]}

Zhang, Yunfang ^{[1
]}

Wei, Huaixin ^{[1
]}

Song, Tao ^{[1
]}

Sun, Baoquan ^{[1
]}

机构：

[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 11期

基金：

中国国家自然科学基金;

关键词：

silicon nanowire arrays; organic monolayer; surface passivation; hybrid Schottky solar cell; charge recombination; NANOWIRE ARRAYS; HETEROJUNCTION;

D O I：

10.1021/am302893r

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We demonstrate a hybrid Schottky junction solar cell based on methyl/allyl groups terminated silicon nanowire arrays (SiNWs) and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) with a power conversion efficiency (PCE) of 10.2%. The methyl/allyl organic monolayer on silicon Can act as an excellent passivation layer for suppressing surface charge, recombination, which is characterized by grazing angle attenuated total reflectance Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy measurements. The transient and steady electric output characteristics measurements indicate that the density of trap states of SiNWs are dramatically suppressed by methyl/allyl surface modification. In addition, the device based on methyl/allyl passivated SiNWs exhibits improved stable electrical output over those based on either methyl or allyl passivated ones. The improved PCE and good stability of the device are ascribed to efficient functionalization of the SiNW surface.

引用

页码：4678 / 4684

页数：7

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