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This is to certify that your paper entitled «Calculating the efficiency of perovskite solar cells using formula (PCE=Voc.Jsc.FF/Pin) and increasing and obtaining the quality of the HTL layer in perovskite solar cells using formula(FF=Pmax/Vac.Jse)» was indexed with 8 pages, in the CIVILICA citation database, code COI:ITMECONF01_012, after evaluation and approval of the referees of the "The first international conference on information technology engineering, mechanics, electricity and engineering sciences 2024.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.