Bulk Heterojunction Organic Solar Cells

The performance of organic solar cells oscs depends on a fine carefully optimized bulk heterojunction bhj microstructure.

Bulk heterojunction organic solar cells.

Five core technologies for their commercialization hongkyu kang school of materials science and engineering research institute for solar and sustainable energies gist icl international collaboration r d centre heeger center for advanced materials gwangju institute of science and technology. Photovoltaic cells featuring a polymeric blend of organics have shown promise in a field largely dominated by inorganic e g. Bulk heterojunction organic solar cells. However for a large scale roll to roll r2r manufacturing of this technology and precise device fabrication further improvements are critical.

The nature and order of the blocking layers as well as the nature of the metal electrode. Past studies on a tandem strategy of integrating perovskite and bulk heterojunction bhj increased the fabrication complexity. In the past decades a p type conjugated polymer and an n type fullerene derivative have been the most commonly used electron donor and electron acceptor respectively. In the last few years the performance of organic solar cells oscs based on bulk heterojunction bhj structure has remarkably improved.

While most advances of the device performance come from the design. Polymer solar cells usually consist of an electron or hole blocking layer on top of an indium tin oxide ito conductive glass followed by electron donor and an electron acceptor in the case of bulk heterojunction solar cells a hole or electron blocking layer and metal electrode on top. Polymer fullerene bulk heterojunction solar cells are a type of solar cell researched in academic laboratories. In this work double bulk heterojunction organic solar cells are fabricated by sequential blade cast in ambient conditions.

Probed by the in situ grazing incidence x ray diffraction and in situ uv vis absorption measurements the seq blade system exhibits a different tendency from each of the binary films during the film formation process. Unsatisfactory light harvesting over the wavelength of 500 nm is a critical factor limiting the further improvement in efficiency of halide lead based perovskite solar cells pscs. In this article recent advances in understanding and controlling the bhj mor. While the first devices had to be stored in an inert atmosphere and degraded quickly on exposure to sunlight today small organic pv modules on flexible substrates with operational lifetimes of a few years are available.

The understanding and manipulation of bhj morphology have been the focus of research in optoelectronic devices.