Improved photovoltaic characteristics of amorphous Si thin-film solar cells containing nanostructure silver conductors fabricated using a non-vacuum process

Micro & nano letters

article

Chung-Yuan Kung¹  Jun-Chin Liu¹  Yu-Hung Chen²  Chen-Cheng Lin²  Hsin-Wei Lu²  Yung-Tsung Liu²  Chao-Cheng Lin² 

[1] Department of Electrical Engineering and Graduate Institute of Optoelectronic Engineering, National Chung Hsing University;Photovoltaic Technology Division, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute

关键词: silver;    silicon;    elemental semiconductors;    amorphous semiconductors;    semiconductor thin films;    nanowires;    solar cells;    photovoltaic effects;    short-circuit currents;    current density;    photovoltaic characteristics;    amorphous Si thin-film solar cells;    highly reflective liquid organic nanostructure silver conductor;    back contact reflectors;    single-junction superstrate configuration;    nonvacuum screen printing process;    conductive paste;    nanowires;    nanostructure sheet;    vacuum-system-sputtered silver samples;    short-circuit current density;    open-circuit voltage;    external quantum efficiency;    light-trapping;    power conversion efficiency;    AM 1.5 illumination;    voltage 66 mV;    wavelength 580 nm to 700 nm;    Si-Ag;   

DOI  :  10.1049/mnl.2014.0416

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A low-cost, highly reflective, liquid organic nanostructure silver conductor with superior conductivity, using back contact reflectors in amorphous silicon (a-Si) single-junction superstrate configuration thin-film solar cells produced using a non-vacuum screen printing process is proposed. The conductive paste is composed of Ag nanowires (Ag NWs) mixed with an Ag nanostructure (Ag NS) sheet. The paste is referred to as ‘Ag NWS’. A comparison of silver conductor samples with vacuum-system-sputtered silver samples indicated that the short-circuit current density (Jsc) and the open-circuit voltage (Voc) of Ag NWS conductor cells exceeded 0.22 mA/cm2 and 66 mV, respectively. The Ag NWS conductor with back contact reflectors in solar cells was analysed using external quantum efficiency measurements to effectively enhance light-trapping ability in a long wavelength region (580–700 nm). The cells constructed using the optimised Ag NWS demonstrated an increase of approximately 6.1% in power conversion efficiency under AM 1.5 illumination. These results indicated that the Ag NWS conductor back contact reflector layer is a suitable candidate for high-performance a-Si thin-film solar cells.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND