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Morphology‐Controlled Organic Solar Cells Improved by a Nanohybrid System of Single Wall Carbon Nanotubes Sensitized by PbS Core/Perovskite Epitaxial Ligand Shell Quantum Dots
Author(s) -
Soltani Rezvan,
Katbab Ali Asghar,
Sytnyk Mykhailo,
Yousefi Amin Amir Abbas,
Killilea Niall,
Berlinghof Marvin,
Ahmadloo Farzaneh,
Osvet Andres,
Unruh Tobias,
Heiss Wolfgang,
Ameri Tayebeh
Publication year - 2017
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201700043
Subject(s) - photoactive layer , materials science , quantum dot , carbon nanotube , photoluminescence , perovskite (structure) , crystallinity , nanotechnology , energy conversion efficiency , solar cell , x ray photoelectron spectroscopy , chemical engineering , heterojunction , optoelectronics , polymer solar cell , composite material , engineering
In the present work, a new solution processed nanohybrid system comprising of single‐wall carbon nanotubes (SWCNTs) loaded by PbS quantum dots (QD) capped with an epitaxial ligand shell of methylammonium lead iodide perovskite clusters (MA 4 PbI 6 ) is designed and fabricated. Attachment of PbS/PbI 6 QDs on the surface of SWCNT is followed and evidenced by performing Fourier Transform Infrared Spectroscopy, X‐ray photoelectron spectroscopy, and Field Emission Scanning Electron Microscopy. The steady state and dynamic photoluminescence results reveal efficient charge transfer from photo‐excited PbS/PbI 6 to SWCNTs. Very low amount (0.3 wt.%) of the as‐synthesized PbS/PbI 6 ‐SWCNT is further incorporated into a polymeric solar cell containing P3HT and PC 61 BM and exhibits a power conversion efficiency improvement of around 15% compared to the P3HT:PC 61 BM bulk heterojunction reference solar cell. Significantly, loading perovskite capped PbS QDs on the surface of SWCNT works more efficient rather than incorporating PbS/PbI 6 or SWCNT separately onto the composition of the photoactive layer. While PbS/PbI 6 broaden the absorption window of photoactive layer and enhance the photon harvesting, their loading on the SWCNT has a significant influence on the faster exciton splitting by efficient electron transfer as well as keeping the desired crystallinity and nanoscale morphology of host matrix upon addition of QDs.