General objectives:

Developement of new technologies using advanced processes on thin polysilicon layers and amorphous silicon, processes of alloying and deposition of metallic thin films and realization of superficial junction by non-conventional techniques.

  • Identification and technological implementation of  techniques to concentrate light on microstructured surfaces
  • Realization of the experimental demonstrator and patenting the technologies
  • Technology validation

 The main problems that have to be solved in the frameof the  project are:

1. Design problems and technological problems for the structure fabrication:

  • new structures of photovoltaic cells of higher efficiency based on thin layers of polycrystalline and amorphous silicon design
  • structures of photovoltaic cells of higher efficiency design using data from simulating software of device and process
  • design of the mask set for fabrication of the demonstrator based on thin layer on silicon/glass substrate
  • making porous solar cells surfaces with doped nanostructured powder for eliminating the reflections at solar cells surface.
  • superficial junctions and the antireflective layer fabrication processes based on sol-gel methods and powder method.
  • specific processes for contacting thin polysilicon and silicon amorphous deposed layers
  • metallization  processes on high efficiency photovoltaic devices microstructured surfaces

2.   Processes and devices characterization

  • technological processes characterization and optimization using interoperation measurements;
  • characterization and optimization of the deposition processes of polysilicon and amorphous silicon thin layer on monocrystalline silicon and glass substrate.
  • polysilicon, amorphous silicon, sol-gel and nanostructured powder thin layer surface characterization
  • characterization of the device electrical parameters
  • Testing set-up realization

The measurable objectives of the project are:
v simulating the unconventional technological processes for high efficiency and ultralightweight solar cells technological flux
v characterization of morphology of thin films deposited by high performance microscopic method; AFM, SEM and XPS
v thin films of solgel and doping powders with optimal characteristics, nonpolluting, user-friendly, cheaper produced with energy low cost
v technical and economical analysis
v technical production specifications
v technical realizing documentation
v Presentation and demonstrations of demonstrator utility
v results communications and publications.
v Patenting the results

OBJECTIVES

  • Studies regarding the solution selection and novel technologies used to realize photovoltaic devices with higher conversion efficiency.
  •  Analysis of the existent software simulation capabilities and the possibilities to use them in order to model the realization processes of highly efficient solar cells. Estimation of the possibilities to use the simulated structure to extract the main electrical characteristics of the device.
  •  Studies regarding the selection of precursors to obtain by sol-gel method of the doped and undoped oxidic layers in order to realize photovoltaic devices with high conversion efficiency (PDHCE)
  • Thin polysilicon and amorphous layers deposition on various substrates
  • Modeling fundamental physics phenomena for high efficiency and ultralightweight solar cells
  • Material characterization by spectrometric method
  • XPS studies of substrates and thin deposed layers
  • Realization and optimization of the experimental models and of laboratory technologies to obtain solar cells on different substrates.
  • Optimization of technological processes for thin polysilicon and amorphous silicon layers deposition Optimizare procese tehnologice de depunere a straturilor subtiri de poli-Si si Si-amorf
  • Thin layers physical characterization (AFM, X-rays analysis, SEM, profilometry)
  • Optimized oxidic layers realization and characterization
  • Optimized nanostructured powders realization and characterization
  • Material characterization by spectrometric method
  • XPS studies of the thin layer/substrate
  • Doped oxidic layers optimization and characterization