Efficient Perovskite-organic Bulk Heterojunction Hybrid Integrated Solar Cells

An integrated perovskite/ organic bulk-heterojunction (BHJ) photovoltaic device was fabricated for efficient light harvesting and energy conversion. The structure of the solar cells consists of two photovoltaic layers, namely a methylammonium lead iodide (CH_3 NH_3 PbI_3) and poly (3-hexylthiophene) (P3HT) blended with metha-nofullerene [6,6]-phenyl C_(61) -butyric acid methyl ester (PCBM) organic BHJ active layer. The power conversion efficiency (PCE) of 6.54% was achieved in the integrated device with a J_(sc) of 19.14 mA / cm~2, a V_(oc) of 0.76 V, and a FF of 45.0%. Compared to that of CH_3 NH_3 PbI_3 / PCBM planar device, the enhanced performance indicates that the BHJ film absorbs light and contributes to the current density of the device. Our research further demonstrates the compatibility and synergistic potential of the perovskite and organic bulk-heterojunction (BHJ) photovoltaic device.