Cove‐Edge Nanoribbon Materials for Efficient Inverted Halide Perovskite Solar Cells
Abstract
Two cove‐edge graphene nanoribbons hPDI2‐Pyr‐hPDI2 (1) and hPDI3‐Pyr‐hPDI3 (2) are used as efficient electron‐transporting materials (ETMs) in inverted planar perovskite solar cells (PSCs). Devices based on the new graphene nanoribbons exhibit maximum power‐conversion efficiencies (PCEs) of 15.6 % and 16.5 % for 1 and 2, respectively, while a maximum PCE of 14.9 % is achieved with devices based on [6,6]‐phenyl‐C61‐butyric acid methyl ester (PC61BM). The interfacial effects induced by these new materials are studied using photoluminescence (PL), and we find that 1 and 2 act as efficient electron‐extraction materials. Additionally, compared with PC61BM, these new materials are more hydrophobic and have slightly higher LUMO energy levels, thus providing better device performance and higher device stability.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 17, 2017
- Source ID
- 10.1002/ange.201706895
Entities
People
- Colin Nuckolls
- Edison Castro
- Elkin L. Romero
- Fang Liu
- Jue Wang
- Luis Echegoyen
- Samuel R Peurifoy
- Thomas J Sisto
- Xiaoyang Zhu
Organizations
- Columbia University
- National Science Foundation
- Office of Naval Research
- United States Department of Defense
- University of Texas at El Paso
- Wind Energy Technologies Office