Enhancing the Photoluminescence Quenching in Donor-acceptor PCE11:PPCBMB Films Through Optimization of the Film Microstructure

Otto Todor-Boer^a^,^b, Ioan Petrovai^a^,^b, Raluca Tarcan^a^,^b, Adriana Vulpoi-Lazar^a, Simion Astilean^a^,^b, Leontin David^a, Roger Hiorns^c, Natalie Stingelin^d^,^e, Ioan Botiz^a^,^d

^aNanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Strada Treboniu Laurian, 42, Cluj-Napoca, Romania

^bFaculty of Physics, Babes-Bolyai University, M. Kogalniceanu Str. 1, 400084, Cluj-Napoca, Romania

^cCNRS, Laboratoire de Chimie des Polymères Organiques (LCPO), (UMR 5629), ENSCBP, IPB, 16 avenue Pey Berland, 33607 Pessac Cedex, France

^dDepartment of Materials, Imperial College London, United Kingdom, Prince’s Consort Road, South Kensington Campus, London, United Kingdom

^eSchool of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

Proceedings of Interfaces in Organic and Hybrid Thin-Film Optoelectronics (INFORM)

València, Spain, 2019 March 5th - 7th

Organizers: Natalie Stingelin, Hendrik Bolink and Michele Sessolo

Poster, Otto Todor-Boer, 085
Publication date: 8th January 2019

We show that controlling CSA deposition parameters such as speed and substrate temperature leads to optimized microstructure of poly (3-hexylthiophene), poly (3-(2′-ethyl) hexylthiophene), poly(3-hexylselenophene), poly[2, 5 - bis(3 - tetradecylthiophen -2-yl)thieno[3, 2 - b]thiophene] and poly[(5, 6 - difluoro - 2, 1 , 3 - benzothiadiazole - 4, 7 - diyl) - alt - (3, 3’’’-di(2 - octyldodecyl) -2,2’;5’,2’’;5’’,2’’’-quaterthiophen- 5, 5’’’-diyl)] systems both in neat films and in blends when coupled with a new electron accepting polyfullerene. Moreover, in blend films we have found a correlation between the processing speed, the resulting microstructure (as revealed by AFM) and the alteration of photoluminescence (as revealed by the photoluminescence spectroscopy). Photoluminescence quenching was more intense for lower deposition speeds most probably due to a more favorable mixing of the two donor-acceptor systems in the resulting bulk heterojunction comprised of crystalline networks of polymer donor domains around molecular size intercalated with polyfullerene domains of similar size.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.