Journal
SOLAR RRL
Volume 2, Issue 5, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201700073
Keywords
Hole transport materials; mobility; perovskite solar cells; small molecules
Funding
- Swedish Research Council
- Swedish Energy Agency
- Knut and Alice Wallenberg Foundation
- National Natural Science Foundation of China [21120102036, 91233201]
- National Basic Research Program of China (973 program) [2014CB239402]
Ask authors/readers for more resources
Spiro-OMeTAD has been the most commonly used hole-transport material in perovskite solar cells. However, this material shows intrinisic drawbacks, such as low hole mobility and conductivity in its pristine form, as well as self-aggregation when deposited as thin film. These are not beneficial properties for efficient hole transport and extraction. In order to address these issues, we have designed a new type of composite hole-transport materials based on a new metal-organic copper complex (CuH) and Spiro-OMeTAD. The incorporation of the molecularly bulky HTM CuH into the Spiro-OMeTAD material efficiently improves the hole mobility and suppresses the aggregation in the Spiro-OMeTAD film. As a result, the conversion efficiencies obtained for perovskite solar cells based on the composite HTM system reached as high as 18.83%, which is superior to solar cells based on the individual hole-transport materials CuH (15.75%) or Spiro-OMeTAD (14.47%) under the same working conditions. These results show that composite HTM systems may constitute an effective strategy to further improve the efficiency of perovskite solar cells.
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