Improved Ambient‐Stable Perovskite Solar Cells Enabled by a Hybrid Polymeric Electron‐Transporting Layer
Abstract
In this work, an efficient inverted perovskite solar cell with decent ambient stability is successfully demonstrated by employing an n‐type polymer, poly{[N,N′‐bis(2‐octyldodecyl)‐1,4,5,8‐naphthalene diimide‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)} (N2200), as the electron‐transporting layer (ETL). The device performance can be further enhanced from a power conversion efficiency (PCE) of 15 to 16.8 % by tailoring the electronic properties of N2200 with a polymeric additive, poly[9,9‐bis(6′‐(N,N‐diethylamino)propyl)‐fluorene‐alt‐9,9‐bis(3‐ethyl(oxetane‐3‐ethyloxy)‐hexyl) fluorene] (PFN‐Ox). More importantly, the device derived from this hybrid ETL can maintain good ambient stability inherent from the pristine N2200 ETL, for which 60–70 % of initial PCE can be retained after being stored in air with 10–20 % humidity for 45 days.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 26, 2016
- Source ID
- 10.1002/cssc.201600921
Entities
People
- Alex K.‐y. Jen
- Chu‐chen Chueh
- Fei Huang
- Guangye Zhang
- He Yan
- Zonglong Zhu
Organizations
- Hong Kong University of Science and Technology
- National Science Foundation
- University of Washington