الفهرس 
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Abstract
This work aims to preparation and characterization new types of perovskite cells to be tested for solar energy conversion.
Objectives
Develop a planar architecture of perovskite solar cell.
Reproduce the experimental result using our developed architecture.
Synthesis of new hole transport layers to based on reduced graphene oxide.
To investigate the influence of prepared interlayers properties on the performance of the solar cells.
Improve the efficiency and of the obtained result.