Failure mechanism for flexible dye-sensitized solar cells under repeated outward bending: Cracking and spalling off of nano-porous titanium dioxide film

Guanjun Yang^a

^aXi'an Jiaotong University, Xianning West Road 28, Xi'an, 710049, China

^bXi'an Jiaotong University, Xianning West Road 28, Xi'an, 710049, China

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

Poster, Guanjun Yang, 285
Publication date: 5th February 2015

Flexibility, as well as efficiency, of flexible dye-sensitized solar cells (DSCs) is of significant importance to their applications. Quantitative bending test was carried out with a lab-developed solar cell bending tester in order to simulate the flexible service condition. The photovoltaic performance, morphology of the photoanode and electrochemical property evolution during bending service were examined to aim at understanding the bending failure mechanism for the flexible DSCs under repeated outward bending (the TiO₂film in the photoanode is in tension). Results show that when the bending radius is 12 mm, the efficiency of the plastic DSCs keeps unchanged with increasing the bending cycle. When the bending radius is smaller than 12 mm, the efficiency of the flexible DSCs decreases with increasing the bending cycle. The electrochemical impedance spectroscopy results show that the increase of the electron transport resistance (R_t) in TiO₂network is responsible for the degradation of efficiency. Furthermore, the photoanodes after repeated bending is cracking and spalling off from the ITO surface. Finally, a failure model for the flexible DSCs under repeated outward bending is proposed.

Jiang, C.Y.; Sun, X.W., Tan, K.W.; Lo, G.Q.; Kyaw, A.K.K.; Kwong, D.L.; Appl. Phys. Lett. 2008, 92, 143101. Li,Y.; Yoo, K.; Lee, D.K.; Kim, J.H.; Park, N.G.; Kim, K.; Ko, M.J.; Curr. Appl. Phys. 2010, 10, E171-E175. He, X.L.; Liu, M.; Yang, G.J.; Yao, H.L.; Fan, S.Q.; Li, C.J.; J. Power Sources 2013, 226, 173-178. He, X.L.; Yang, G.J.; Li, C.J.; Fan, S.Q.; Liu, M.; J. Power Sources 2015, 280, 182-189.

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.