*Proceeding Paper* **Fabrication of Carbon-Based Perovskite Solar Cell under Ambient Condition †**

**Abdul Basit \*, Aimal Daud Khan and Adnan Daud Khan**

US-Paksitan Center for Advanced Studies in Energy, University of Engineering and Technology, Peshawar 25000, Pakistan; aimaldaud.uspcase@uetpeshawar.edu.pk (A.D.K.); adnan.daud@uetpeshawar.edu.pk (A.D.K.)


**Abstract:** In this study, the viability of the commercial production of ambient air perovskite solar cells is investigated. In order to address issues with overlapping and non-uniform layers and minimize recombination losses, this study suggests a novel device architecture. A 2 <sup>×</sup> 2cm2 perovskite solar cell with a 4.2% power conversion efficiency (PCE) was successfully created utilizing a straightforward screen-printing technique. After humidity treatment, the short-circuit current (jsc) and open-circuit voltage (Voc) were stabilized at 5.36% due to layer optimization. These results show the potential for the widespread industrial production of more durable and efficient perovskite solar cells.

**Keywords:** perovskite solar cell; screen printing; ambient condition
