Improvement of quantum and power conversion efficiency through electron transport layer modification of ZnO/perovskite/PEDOT: PSS based organic heterojunction solar cell

• Published in: Solar energy Vol. 185; pp. 439 - 444
• Main Authors: Maity, Santanu, Das, Biswajit, Maity, Reshmi, Maity, Niladri Pratap, Guha, Koushik, Srinivasa Rao, K.
• Format: Journal Article
• Language: English
• Published: New York Elsevier Ltd 01-06-2019; Pergamon Press Inc
• Subjects: Circuits; Collection; Efficiency; Electron transport; Energy conversion efficiency; Heterojunctions; Nanopillar; Organic chemistry; Perovskite; Perovskites; Photovoltaic cells; Quantum efficiency; Self-assembled monolayers; Self-assembly; Short circuit currents; Solar cell; Solar cells; Solar energy; Solar energy materials; Solar power; Thin films; Zinc oxide; Solar cell; Thin films; Perovskite; Nanopillar; Quantum efficiency; Solar energy materials
• ISSN: 0038-092X; 1471-1257
• DOI: 10.1016/j.solener.2019.04.092

•Glass/ITO/ZnO-ZnMgO (nano)/PCBM/CH3NH3PbI3-xClx/PEDOT: PSS/C3-SAM/Ag based hybrid organic solar cell is fabricated.•Efficiency of 14.7% is achieved.•ZnMgO nanorods are textured and passivated using a simple chemo-thermal process, post-thin-film growth.•Demonstration of use of CH3-SAM and ZnO/ZnMgO nano thin-films to substantially improved the solar cell efficiency.
This paper represents perovskite material based hybrid (ITO/ZnO-ZnMgO (nano)/PCBM/CH3NH3PbI3-xClx/PEDOT: PSS/C3-SAM/Ag) organic solar cell with high quantum and power conversion efficiency. Due to the insertion of 3-aminopropanoic acid as an ambipolar self-assembledmonolayer (C3-SAM) and ZnO/ZnMgO layer carrier collection efficiency increases. An optical modified structure is proposed (through the modification of ZnO/ZnMgO layer) to increase the surface to volume ratio and enhance the photon collection efficiency. As a result, the Internal quantum efficiency (IQE) increases 83.2% to 91.7% fill factor (FF) changes from 77% to 85%, short circuit current density (Jsc) changes from 14.9 mA/cm2 to 21 mA/cm2, and overall solar cell efficiency increases from 9.17 to 14.7%.