Development of Novel Nanocomposite Films and Doping Techniques for Improving the Practicality of Flexible Perovskite Solar Cells

  • Chang, Chih-Yu, (PI)

Project: A - Government Institutionb - Ministry of Science and Technology

Description

The integration of solar cell modules into traditional building elements or wearable devices has drawn much attention in recent years. This technology will open up new markets apart from any other existing products. The solar cells based on hybrid lead halide perovskite are applicable for such applications, thanks to their potential advantages of cost-effective, flexible, thin, lightweight, and large-scale manufacturing capability. Despite these advantages, their performance, lifetimes, and optical properties are far from acceptable for practical use, and only considerably fewer efforts have been devoted to address these issues. Recently, my research group has been making impact to the development of perovskite solar cells, and our work has led to remarkable breakthroughs. The obtained PCEs are the highest reported to date for perovskite solar cells with the active area of ~1.2 cm2. Based on our recent findings, we will furthers propose new strategies to achieve high-performance, stable, large-area flexible solar cells based on cost-effective procedures in this project, where the following key technologies will be pursued: (1) nanocomposite thin films for developing transparent conductive layer, interfacial layer, and encapsulation layer; (2) doping technology for enhancing the optoelectronic properties of the interfacial layers; (3) device engineering for improving the light utilization and for developing large-area blade-coating techniques. We have preliminarily examined the feasibility of the proposed strategies: (1) high optical transmittance (~80%) , low resistance (6.7 ohm sq-1) ultrathin Ag film is demonstrated through the incorporation of self-assembled monolayer; (2) effective interfacial layers are developed through solution-phase doping method; (3) antireflection coating is designed by optical simulations based on Transfer matrix method; (4) high-performance encapsulation film is developed by employing three pairs of alternating inorganic and organic layers. Based on these strategies, the perovskite solar cells with a centimeter-scale active area (6 cm2) delivers a high PCE of 13.2%.
StatusFinished
Effective start/end date8/1/167/31/17

Keywords

  • Interfacial modification
  • Doping technique
  • Device engineering
  • Perovskite solar cells
  • Power conversion efficiency