A universal surface texture by solution coating

M. Tao, W. Zhou, Y. Wang, Q. Guo, H. Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this paper we propose a 'build-up' approach for surface texturing on solar cells. By coating solar cells with a monolayer of dielectric microparticles, followed by a dielectric film with a thickness less than the height of the particles, a surface texture can be formed on almost any type of solar cells. More importantly, this texture is prepared by solution coatings, ensuring its low cost. Dielectric particles of various shapes, spherical, pyramidal and conical, can all be used. Current experiments focus on spherical silica microparticles partially immersed in a spin-on glass film. It has been demonstrated that the spherical texture improves the transmittance of quartz substrate between 400 and 1,100 nm and in the incident-angle range of surface normal to at least 30°. Extensive modeling has been performed to optimize the design of and to find the process windows for the coatings. Recent progress includes uniform monolayer coating of silica microparticles on substrates of 6×6 in2 in size by a convective process. Remaining challenges in integration of this texture into solar cells include: 1) index matching with top glass cover and existing antireflective coating; 2) cost-effective synthesis of index-matched dielectric microparticles and 3) large-area uniform coating of monolayer particles on rough poly-Si substrates.

Original languageEnglish (US)
Title of host publication33rd IEEE Photovoltaic Specialists Conference, PVSC 2008
StatePublished - 2008
Externally publishedYes
Event33rd IEEE Photovoltaic Specialists Conference, PVSC 2008 - San Diego, CA, United States
Duration: May 11 2008May 16 2008

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371


Other33rd IEEE Photovoltaic Specialists Conference, PVSC 2008
Country/TerritoryUnited States
CitySan Diego, CA

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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