Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 120, Issue 23, Pages 12900-12908Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b03695
Keywords
-
Funding
- ETH
- Swiss National Science Foundation through the NCCR Quantum Science and Technology
Ask authors/readers for more resources
Charge carrier lifetimes play an important role in determining the efficiency of a solar cell but remain poorly understood in nanocrystal-based devices. Carrier lifetimes are often determined using transient photovoltage measurements. Here, we perform transient photovoltage measurements on PbS nanocrystal-based solar cells and determine that the photovoltage decay time cannot be directly interpreted as the carrier lifetime. We show that the decay time can be modeled as the lifetime of an RC circuit, with the resistive component indicating the degree of trap-assisted Shockley-Read-Hall recombination and capacitive contribution coming from the space charge region. These results provide a model with which transient photovoltage data on nanocrystal devices can be analyzed and used to guide device design.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available