Affiliation:
1. Department of Flexible and Printable Electronics LANL‐JBNU Engineering Institute‐Korea Jeonbuk National University 54896 Jeonju Republic of Korea
2. Department of Physics, Faculty of Science South Valley University 83523 Qena Egypt
3. KEPCO Research Institute Korea Electric Power Corporation 34056 Daejeon Republic of Korea
Abstract
AbstractThe development of anti‐solvent free, scalable, and printable perovskite film is crucial to realizing the low‐cost roll‐to‐roll development of perovskite solar cells (PSCs). Herein, large‐area perovskite film fabrication is explored using a spray‐assisted sequential deposition technique. How propylene carbonate (PC) solvent additive affects the transformation of lead halide (PbI2) into perovskite at room temperature is investigated. The result shows that PC‐modified perovskite films exhibit a uniform, pinhole‐free morphology with oriented grains compared with pristine perovskite films. The PC‐modified perovskite film also has a prolonged fluorescence lifetime that indicates lower carrier recombination. The champion PSC devices based on PC‐modified perovskite film realize a power conversion efficiency (PCE) of 20.5% and 19.3% at an active area (A) of 0.09 cm2 and 1 cm2, respectively. The fabricated PSCs are stable and demonstrate ≥85% PCE retention following 60 days of exposure to ambient conditions. Furthermore, perovskite solar modules (A ≈ 13 cm2) that yield a PCE of 15.8% are fabricated. These results are among the best reported for the state‐of‐art spray‐coated PSCs. Spray deposition coupled with a PC additive is highly promising for economical and high‐output preparation of PSCs.
Funder
National Research Foundation of Korea
Korea Electric Power Corporation
Subject
General Materials Science,General Chemistry
Cited by
2 articles.
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