Bulk Heterojunction Organic Solar Cells

In this work double bulk heterojunction organic solar cells are fabricated by sequential blade cast in ambient conditions.

Bulk heterojunction organic solar cells.

The nature and order of the blocking layers as well as the nature of the metal electrode. In this article recent advances in understanding and controlling the bhj mor. Silicon solar cells specifically fullerene derivatives act as electron acceptors for donor materials like p3ht poly 3 hexyl thiophene 2 5 diyl creating a. The bulk heterojunction blend of an electron donor and an electron acceptor material is the key component in a solution processed organic photovoltaic device.

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. Bulk heterojunction organic solar cells. Polymer fullerene bulk heterojunction solar cells are a type of solar cell researched in academic laboratories. Past studies on a tandem strategy of integrating perovskite and bulk heterojunction bhj increased the fabrication complexity.

Remarkable improvement in durability of bulk heterojunction solar cells remarkable progress has been achieved during the last ten years. 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. However for a large scale roll to roll r2r manufacturing of this technology and precise device fabrication further improvements are critical. The understanding and manipulation of bhj morphology have been the focus of research in optoelectronic devices.

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. Photovoltaic cells featuring a polymeric blend of organics have shown promise in a field largely dominated by inorganic e g. 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. While most advances of the device performance come from the design.

In the last few years the performance of organic solar cells oscs based on bulk heterojunction bhj structure has remarkably improved.