Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
DOI: https://doi.org/10.29363/nanoge.hopv.2023.074
Publication date: 30th March 2023
The past two decades of vigorous interdisciplinary approaches has seen tremendous breakthroughs in both scientific and technological developments of next-generation solar cells, bulk-heterojunction organic photovoltaics (OPVs) based on nanocomposites of π-conjugated organic semiconductors and perovskite solar cells (PSCs) utilizing hybrid organometal halide perovskite materials. Because of their unique functionalities, both solar cells are expected to enable innovative photovoltaic applications that can be difficult to achieve using traditional inorganic solar cells: they are printable, portable, wearable, disposable, biocompatible, and attachable to curved surfaces. The ultimate objective of this field is to develop cost-effective, stable, and high-performance photovoltaic modules fabricated on large-area flexible plastic substrates via high-volume/throughput roll-to-roll printing processing and thus achieve the practical implementation of both OPVs and PSCs.
Recently, intensive research efforts into the development of both photo-active materials, processing techniques, interface engineering, and device architecture have led to a remarkable improvement in power conversion efficiencies, approaching almost 20% for OPVs and exceeding 25% for PSCs, which have finally brought both photovoltaics close to commercialization. Current research interests are expanding from academic to industrial viewpoints to improve device stability and compatibility with large-scale printing processes, which must be addressed to realize viable applications. Here, both academic and industrial issues are reviewed by highlighting historically monumental research results and recent state-of-the-art progress of our group (GIST) in the development of printed modules of OPVs and PSCs. Moreover, perspectives on five core technologies that affect the realization of the practical use of these photovoltaics are presented, including device efficiency, device stability, flexible and transparent electrode, module designs, and printing techniques.