Influence of hybrid organic- inorganic tailored interfaces on perovskite solar cell efficiency and stability

Influence of hybrid organic- inorganic tailored interfaces on perovskite solar cell efficiency and stability

Internship Description

In the last decade, photovoltaic solar cells based on new ‘perovskite’ materials have risen from light-to-electricity conversion efficiencies of 4% to over 23%. Such materials have attracted an unprecedented level of attention among researchers given their ease of processing, widely tunable optical and electrical properties, and their low cost. However, many challenges still remain on the path to the eventual commercial realization of perovskite photovoltaic technology: The prime issue being that of device stability.

Perovskite light absorbing materials are sensitive to many external degradation factors including humidity, presence of oxygen, high light intensities and ion migration within the perovskite material. It has been observed that perovskite thin films with high quality, defect-free interfaces tend to yield longer overall stability compared to films with defective interfaces. This is thought, in part, to be the result of ion migration at the barriers between perovskite material and charge-selective material (allowing electrons to flow to and from the perovskite).


In this project, the student will investigate the influence of tailored interfaces between perovskite and charge-selective material both on solar cell efficiency and stability. In order to quickly trial new interfacial materials, these solar cells will be tested under high light illumination to simulate accelerated lifetime testing (from a stability point of view) and high electrical current throughput. These tailored interfaces may be enabled using thin interlayer materials to improve compatibility between the perovskite and novel charge selective materials.

Deliverables/Expectations

  • Device engineering of organic/hybrid interfaces
  • Fabrication of perovskite devices with new interfaces
  • Performing stability measurements with various environmental condition
  • Accelerated lifetime studies
  • Electrical characterization of perovskite solar cells before and after degradation
  • High light intensity measurements

Faculty Name

Derya Baran

Field of Study

Materials Science, Optics and photonics, physics