Planar Perovskite Solar Cells Using Perovskite CsPbI<sub>3</sub> Quantum Dots as Efficient Hole Transporting Layers
oleh: Tsair-Chun Liang, Hsin-Yu Su, Sih-An Chen, Yen-Ju Chen, Chung-Yu Chiang, Chih-Hsun Chiang, Tzung-Ta Kao, Lung-Chien Chen, Chun-Cheng Lin
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-12-01 |
Deskripsi
Perovskite CsPbI<sub>3</sub> quantum dots (QDs) were synthesized as a hole-transporting layer (HTL) of a planar perovskite solar cell (PSC). By using the Octam solution during the ligand engineering, CsPbI<sub>3</sub> QDs exhibits a denser grain and a larger grain size due to the short-chain ligands of Octam. In addition, CsPbI<sub>3</sub> QDs with the Octam solution showed a smooth and uniform surface on MAPbI<sub>3</sub> film, indicating the QDs improved the microstructure of the MAPbI<sub>3</sub> perovskite film. As a result, the PSC with CsPbI<sub>3</sub> QDs as an HTL has the optimal open-circuit voltage as 1.09 V, the short-circuit current as 20.5 mA/cm<sup>2</sup>, and the fill factor (FF) as 75.7%, and the power conversion efficiency (PCE) as 17.0%. Hence, it is inferred that introducing QDs as a HTL via the ligand engineering can effectively improve the device performance of the PSC.