Efficiency Enhancement via One-pot Reduced Graphene-Zinc Oxide Hybrid Material of Electron Transporting Layer in Perovskite Solar Cell

• Main Authors: Ching-Heng Chang, 張京衡
• Other Authors: Kuo-Huang Hsieh
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/87j2j5

碩士 === 國立臺灣大學 === 化學工程學研究所 === 105 === Perovskite solar cell is highly studied by scholars in recent years. With the advantage of low pollution, solution process and low cost, perovskite solar cell’s research does not stop. On the other hand, graphene being a novel material with many properties also attracts the attention of scientists. Zinc oxide (ZnO) and titanium dioxide (TiO2) are commonly used as the materials of electron transporting layer in perovskite solar cell. In this study, we investigate the influence toward efficiency by adding graphene to combine with zinc oxide. Simultaneously, we use scanning electron microscope, transmission electron microscope, UV spectroscopy, incident photon conversion efficiency and X-Ray diffraction to measure physical properties to explore the reason of efficiency improvement. With the replacement of traditional materials in electron transporting layer by reduced graphene oxide with a zinc oxide nanoparticle (r-GO-ZnO), power conversion efficiency reaches 15.02 %. Open-circuit photovoltage and short circuit current density also increase massively. We speculate zinc oxide playing a crucial role connecting graphene and active layer via p–π stacking/electrostatic interaction and therefore electrons can transport smoothly with the consequence of enhancement of power conversion efficiency.