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Public Seminar of RPg Student:
Nickel Oxide Engineering for Efficient and Stable Perovskite Solar Cells


Speaker:Mr. Yi ZHANG
Affiliation:The University of Hong Kong
Date:June 10, 2020 (Wednesday)
Time:11:00 a.m.
Venue:Room 522, 5/F, Chong Yuet Ming Physics Building, HKU

Abstract
 

Although power conversion efficiency(PCE) of the champion perovskite solar cell(PSC) has exceeded 25%, which is close to the theoretical Shockley–Queisser limit efficiency (30.5%), practical application of PSCs is still being hindered by its poor stability and reproducibility, especially under ambient air condition. Thus further exploration of proper carrier transport layer and material engineering is critical for PSCs with high efficiency, low-cost and long-term stability. PSCs with inorganic Nickel Oxide (NiOx) as hole transport lay(HTL) have attracted much attention for its energetically favorable energy band position, high hole mobility, superior chemical stability and low cost synthesis & manufacturing process. While NiOx HTL itself suffers from inhomogeneous grain size, mismatched energy level alignment and insufficient interfacial contact with perovskite layer, NiOx engineering such as doping and surface modification was introduced to achieve size-tunable smooth and compact HTL with improved energy alignment matching with perovskite, finally more efficient and stable PSCs can be obtained due to higher hole mobility, better crystallinity of perovskite and less interfacial recombination.

Anyone interested is welcome to attend.