Molecularly Designed Zinc (II) Phthalocyanine Derivative as Dopant-Free Hole-Transporting Material of Planar Perovskite Solar Cell with Preferential Face-on Orientation

Hole-Transporting Materials In article number , Zong-Xiang Xu and co-workers synthesize dopant-free hole-transporting material containing hexamethyl-mono-n-butyl-substituted zinc phthalocyanine that demonstrates fully face-on molecular orientation when spin-coated on perovskite. The as-fabricated n-i-p planar perovskite solar cells exhibit a high power conversion efficiency of 17.41% and long-term stability, retaining over 90% of their initial efficiency after storage in humidity (about 75%) for 1400 h without encapsulation.