Qualifying composition dependent p and n self-doping in CH3NH3PbI3
Abstract
We report the observation of self-doping in perovskite. CH3NH3PbI3 was found to be either n- or p-doped by changing the ratio of methylammonium halide (MAI) and lead iodine (PbI2) which are the two precursors for perovskite formation. MAI-rich and PbI2-rich perovskite films are p and n self-doped, respectively. Thermal annealing can convert the p-type perovskite to n-type by removing MAI. The carrier concentration varied as much as six orders of magnitude. A clear correlation between doping level and device performance was also observed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 20, 2014
- Source ID
- 10.1063/1.4899051
Entities
People
- Haipeng Xie
- Jinsong Huang
- Lu Lyu
- Qi Wang
- Xiaoliang Liu
- Yongli Gao
- Yuchuan Shao
Organizations
- Central South University
- Defense Threat Reduction Agency
- National Science Foundation
- University of Nebraska–Lincoln
- University of Rochester