Research On Photoelectric Properties Of Silver Copper Iodide/Perovskite Solar Cells

Perovskite solar cells based on organometal halide has attract broad attention due to their superb power conversion efficiency (PCE) along with simple preparation process since in 2009. In only 8 years, the PCE of perovskite solar cells has exceed 22%. In order to improve the PCE of perovskite solar cells as much as possible, the hole transport layer is organic material which is expensive and complicated to synthesis, such as Sprio-OMeTAD, P3HT and PEDOT: PSS. It will increase the cost and affect the stability of the device. In this paper, we fabricated silver copper iodide/CH3NH3PbI3 cross blended layer for efficient HTL-free perovskite solar cells by a simple direct element reaction and spin-coating. A PCE of 11.69% was recorded under AM1.5G simulated sunlight at present and their properties will be investigated as follows:(1) The optical and electrical characteristics and the mechanism of the perovskite semiconductor thin films materials have also been systematically studied. It is the spinning process, which is generally employed just as a film building technique,perfectly accomplished for the in-situ fabrication of AgI QDs/ CH3NH3PbI3 cross blended layer.(2) TPV can reveal the photoinduced charge carrier dynamic for thin film solar cells. The result shows that the Agl has the effect of blocking the electrons. TPV curves of pristine and Ag0.6Cu0.4l/ perovskite thin films exhibit quite different charge carrier response. The different TPV signal of the two samples indicated that the energy level in the perovskite thin film may be changed by Ag0.6Cu0.4I.The major innovation of this research, (1) We obtained a silver copper iodide/perovskite cross blended layer by using a simple spin coating method in which Agl forms quantum dots during spin coating; (2) we have prepared this material in the structure of perovskite solar cells without hole transport layer and effectively reduce the cost with a high photoelectric conversion efficiency; (3) we first apply Ago 6Cu0.4l to perovskite thin film solar cells. As far as we know, there is no report on Ag0.6Cu0.4I,especially in the perovskite thin film solar before.In our fixture research, we will design and fabricate kinds of silver copper iodide/ perovsite solar cells with order microstructure, basing on our obtained technology in fabr-icating solar cells. We will optimize the interface microstructure of device to increase the power conversion efficiency of this novel and inexpensive solar cell. This research will play a positive role in theoretical study and performance improving of perovskite solar cells.