CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

A New Tetracyclic Lactam Building Block for Thick, Broad-Bandgap Photovoltaics

Renee Kroon (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Amaia Diaz de Zerio Mendaza (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Scott Himmelberger ; Jonas Bergqvist ; Olof Bäcke (Institutionen för teknisk fysik, Eva Olsson Group ) ; Gregório Couto Faria ; Feng Gao ; Abdulmalik Obaid ; Wenliu Zhuang (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Desta Antenehe Gedefaw (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Eva Olsson (Institutionen för teknisk fysik, Eva Olsson Group ) ; Olle Inganäs ; Alberto Salleo ; Christian Müller (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi)
Journal of the American Chemical Society (0002-7863). Vol. 136 (2014), 33, p. 11578–11581.
[Artikel, refereegranskad vetenskaplig]

A new tetracyclic lactam building block for polymer semiconductors is reported that was designed to combine the many favorable properties that larger fused and/or amide-containing building blocks can induce, including improved solid-state packing, high charge carrier mobility, and improved charge separation. Copolymerization with thiophene resulted in a semicrystalline conjugated polymer, PTNT, with a broad bandgap of 2.2 eV. Grazing incidence wide-angle X-ray scattering of PTNT thin films revealed a strong tendency for face-on π-stacking of the polymer backbone, which was retained in PTNT:fullerene blends. Corresponding solar cells featured a high open-circuit voltage of 0.9 V, a fill factor around 0.6, and a power conversion efficiency as high as 5% for >200 nm thick active layers, regardless of variations in blend stoichiometry and nanostructure. Moreover, efficiencies of >4% could be retained when thick active layers of 400 nm were employed. Overall, these values are the highest reported for a conjugated polymer with such a broad bandgap and are unprecedented in materials for tandem and particularly ternary blend photovoltaics. Hence, the newly developed tetracyclic lactam unit has significant potential as a conjugated building block in future organic electronic materials.

Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2014-08-30. Senast ändrad 2014-11-27.
CPL Pubid: 202132


Läs direkt!

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)
Institutionen för teknisk fysik, Eva Olsson Group (2012-2015)


Nanovetenskap och nanoteknik

Chalmers infrastruktur