Multilayered MoS2 nanoflakes bound to carbon nanotubes as electron acceptors in bulk heterojunction inverted organic solar cells

摘要

We demonstrate the deposition of multilayered MoS2 on a low-cost metallic-semiconducting carbon nanotube via chemical vapor deposition, and the use of this material as electron acceptor species forming a bulk heterojunction with P3HT in inverted-type organic photovoltaics (OPVs). This is an uplifting discovery, in which MoS2 has been used as an electron acceptor in spite of its innate immiscibility with organic compounds. This is possible because we utilize carbon nanotube's nature to intercalate with P3HT through pi-pi interaction. The successful binding of MoS2 onto carbon nanotube bundles and its optoelectronic effect as a photovoltaic device has been lucidly analyzed through various techniques in this paper. The effect has been ultimately evidenced by a power conversion efficiency of 0.46%, which proves MoS2 with many advantages can also be used as a photoactive layer.