Ultra-high open-circuit voltage of tin perovskite solar cells via an electron transporting layer design.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32144245.
- Also identified by DOI 10.1038/s41467-020-15078-2 and PMC identifier 7060347.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Tin perovskite is rising as a promising candidate to address the toxicity and theoretical efficiency limitation of lead perovskite. However, the voltage and efficiency of tin perovskite solar cells are much lower than lead counterparts. Herein, indene-C<sub>60</sub> bisadduct with higher energy level is utilized as an electron transporting material for tin perovskite solar cells. It suppresses carrier concentration increase caused by remote doping, which significantly reduces interface carriers recombination. Moreover, indene-C<sub>60</sub> bisadduct increases the maximum attainable photovoltage of the device. As a result, the use of indene-C<sub>60</sub> bisadduct brings unprecedentedly high voltage of 0.94 V, which is over 50% higher than that of 0.6 V for device based on [6,6]-phenyl-C61-butyric acid methyl ester. The device shows a record power conversion efficiency of 12.4% reproduced in an accredited independent photovoltaic testing lab.