Morphological Stability of Organic BHJ Solar Cells

James Durrant^a, Iain McCulloch^a, Ching-Hong Tan^a, Bob Schroeder^a, Zhe Li^a, Him-Cheng Wong^b, Kar Ho Chiu^b, Joao Cabral^b

^aImperial College London, United Kingdom, South Kensington, Londres, Reino Unido, United Kingdom

^bImperial College London, United Kingdom, South Kensington, Londres, Reino Unido, United Kingdom

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Oral, Zhe Li, presentation 009
Publication date: 5th February 2015

Morphological stability is a key consideration for outdoor operation of organic BHJ solar cells and achieving morphological stability on the timescales required for commercial application without compromising material complexity and/or device efficiency remains a significant challenge. Morphological stability is found to depend upon a number of factors, such as choice of polymers/fullerenes, film processing conditions, electrode interfaces, and thermal stress/ lighting conditions. Thermal ageing studies for a range of polymer:fullerene systems in our group indicate that one important cause for the rapid degradation of OPV devices is the nucleation/growth of detrimental PCBM crystallites under thermal stress. In the proposed presentation I will discuss how superior morphological stability can be achieved by controlling PCBM aggregation/crystallisation, as well as the impact of substrates and processing conditions upon the morphological stability of organic solar cells under thermal stress. I will also present a number of recently developed morphological stabilising approaches that result in significantly enhanced device thermal stability without compromising device performance.^1-3 These approaches provide promising strategies for future commercialization of efficient, stable organic solar cells.
Illustration of a range of technologies we have developed to improve morphological and device stability under thermal stress.
1.Li, Z.; Wong, H. C.; Huang, Z.; Zhong, H.; Tan, C.H.; Tsoi, W.C.; Kim, J.S.; Durrant, J.R.; Cabral, J.T. Performance enhancement of fullerene-based solar cells by light processing. Nat. Commun. 2013, 4:2227. 2.Wong, H.C.; Li, Z.; Tan, C.H.; Zhong, H.; Huang, Z.; Bronstein, H.; McCulloch, I.; Cabral, J.T.; Durrant, J.R. Morphological Stability and Performance of Polymer–Fullerene Solar Cells under Thermal Stress: The Impact of Photoinduced PC60BM Oligomerization. ACS Nano, 2014, 8, 1297-1308. 3.Schroeder, B.C.; Li, Z.; Brady, M.A.; Faria, G.C.; Ashraf, R.S.; Takacs, C.J.; Cowart, J.S.; Duong, D.T.; Chiu, K.H.; Tan, C.H.; Cabral, J.T.; Salleo, A.; Chabinyc, M.L.; Durrant, J.R.; McCulloch, I. Enhancing Fullerene-Based Solar Cell Lifetimes by Addition of a Fullerene Dumbbell. Angew. Chem. Int. Ed. 2014, 53, 12870-12875.

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.