Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
Stabilization of the efficient perovskite solar cells (PSCs) using a low-cost and simply affordable hole transporting materials (HTMs) has been identified as a current challenge. HTMs are irreplaceable components, which help to improve efficiency of hole extraction and reverse electron flow blocking. In a regular PSC with n-i-p structure HTM spiro-OMeTAD is routinely employed as highly efficient reference material [1]. Although PSCs have recently reached certified power conversion efficiency (PCE) of 25.7%, there is a renewed interest to engineer new HTMs, which can help to exceed the currently certified PCE.
In this work, four HTMs containing different central heteroatoms leading to multi-armed enamines were synthesized by a simple and straightforward condensation reaction, which in contrary to spiro-OMeTAD does not require expensive palladium catalysts and water is the only by-product. In addition, simple product workup and purification may result in significantly reduced synthesis costs.
To investigate photoelectrical properties of synthesized HTMs hole drift mobility (µ) and ionization potential (IP) were measured. Solid-state IP was measured using the electron photoemission in the air (PESA) to study the HOMO energy level of novel enamines. The results demonstrated that the central atom significantly influences the HOMO level, the N-containing compound V1435 showed the highest-lying HOMO level of 5.27 eV, while other HTMs containing less electron rich central atom showed lower levels (O-V1433, S-V1434, and C-V1431 (5.37<5.52<5.54 eV), respectively). Charge transport properties of the investigated HTMs were measured using xerographic time-of-flight (XTOF) technique. V1435 exhibited the highest zero-field hole drift mobility (µ0) among the series having the value of 2.0 × 10-5 cm2 V-1 s-1, while the other enamines demonstrated one order of magnitude lower hole drift mobility.
n-i-p solar cells were fabricated with the device layout ITO/SnO2/perovskite/HTM/Au to test novel materials as hole transporting layers. The device containing HTM V1435 exceeded a photovoltaic performance of 20% outperforming commercial spiro-OMeTAD. In addition, this is the highest registered efficiency comparing to our previously published enamine-based HTMs.
VG and DV acknowledge funding from the Research Council of Lithuania under grant agreement Nr. 01.2.2-LMT-K-718-03-0040 (SMARTMOLECULES).
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.
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.
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.