| As research focus in the field of photovoltaic, Perovskite Solar Cells (PSCs) based on organic-inorganic perovskite light-absorbing materials have exhibited advantages like simple preparation process, solution processable and high power conversion efficiency. Currently, highest power conversion efficiency of PSC have reached 20%, but most of the performance reports were from the research of smaller devices, some problems to be solved still exist in the preparation cost, stability and large-areas of modularity. In this thesis, we design and fabricate large-area PSCs with low-cost and high stability, with one aim at conducting a exploratory research for the industrial production of PSCs.Firstly, for the purpose of fabricating large-area PSCs, based on the characteristics of each functional layer of PSCs we introduced dip-coating and screen printing methods to prepare the electron collection layer and carbon back electrodes, respectively. Results showed that, by screen printing of TiO2 layer, PSCs obtained a high power conversion efficiency (PCEs) of 11.16%, comparable to that prepared by conventional spin coating method. Moreover, we added some PEDOT:PSS to low temperature printing carbon paste, by which PSCs were prepared and gained a PCE of 4.20%, which then exhibited excellent long-term stability.Secondly, we designed and prepared large-area PSCs devices in parallel, serial, as well as parallel-serial hybrid connection configurations. The active area of these devices ranged from 12.6 cm2 to 13.6 cm2. Three devices in different configurations gained PCEs of 4.08%, 2.09% and 3.69%, respectively.Finally, we replaced the precious metal back electrode with carbon back electrode, a large area and HTM-free C-PSCs device was fabricated to examine its long-term stability. The results showed that C-PSCs in series connection with active area of 10.8 cm2 gained 2.03% of PCEs. Moreover, our C-PSCs still showed good stability after 2500 h when being kept in air and dark, and without encapsulation. |
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