本体异质结太阳能电池效能的数值模拟

s a photovoltaic device, organic solar cellhas graspedthe focus for it is not only inexpensive but also mechanically flexible. Based on Onsager's theory,we developed a numerical model of carrier drift-diffusion equation, which enabled us to predict photovoltaic behavior for ordered and random morphology of bulk heterojunction solar cells. This studyestablished a 2D phase separationmodel to explore the relationships between the bulk heterojunction structure and device's final efficiency by Matlab software. Afterwards, the Python software was applied to further analyze the concentration of electron, hole and exciton with the change of time and place. Throughobtained J-V curve, the movement of electron and hole, as well as the efficiency and fill factor were analyzed under two conditions: random morphology under different k value and ordered morphology under different spacing. And the results show that:1.In random morphology active layer, the gradient energy coefficient κ influenced the maximum output power(i.e. Pmax)of organic solar cells. 2. In ordered morphology active layer, the Pmaxwas inversely proportional tothe spacing between dornor and acceptor.3. Under same condition, Pmaxof ordered morphology was higher than that of random morphology.