Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
DOI: https://doi.org/10.29363/nanoge.iperop.2024.028
Publication date: 18th October 2023
Polymer solar cells have attracted much attention as a next-generation renewable energy source. Recently, power conversion efficiency has exceeded 19% even for single junction solar cells. Ternary blending is one of the key approaches in achieving such high-efficiency polymer solar cells. In this talk, I will discuss how ternary blending of three different materials in the photoactive layer can effectively improve not only light harvesting but also charge transport in polymer solar cells. In ternary blend polymer solar cells based on a wide-bandgap polymer (P3HT), a fullerene acceptor (PCBM), and a low-bandgap molecule (SiPc), photocurrent can be increased by additional absorption of SiPc and efficient exciton harvesting due to long-range energy transfer from P3HT to SiPc [1]. Interestingly, not only photocurrent but also fill factor is increased effectively in ternary blend polymer solar cells based on a wide-bandgap polymer (PDCBT), a low-bandgap polymer (PTB7-Th), and a fullerene acceptor (PCBM) [2]. In order to discuss the origin of the improved charge transport, we studied charge transport of conjugated polymers blended with an insulating polymer (PS) [3]. As a result, we found most of conjugated polymers exhibited improved hole transport in films blended with PS rather than their neat films. This finding shows that charge transport can be also improved by using ternary blends.
This study was partly supported by a green innovation fund project commissioned by the New Energy and Industrial Technology Development Organization (NEDO), and by JST MIRAI projects Grant Number JPMJMI20E2 and JPMJMI22E2, Japan.
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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.
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