| dc.description.abstract | The new generation of perovskite solar cells has been developed rapidly in recent years.
The efficiency of organic-inorganic perovskite solar cells has reached 25.7%, which is close to
traditional silicon-based solar cells. However, the organic cations makes it highly sensitive to
water and oxygen, and it is easy to degrade under long-term using. It is the disadvantage of
organic-inorganic perovskite solar cells, making it difficult to apply in commercial applications.
Therefore, more and more scientists turn to research on relatively stable all-inorganic series of
perovskite solar cells. Among them, CsPbBr3 material has the best stability.
At present, the research on CsPbBr3 solar cells is still based on the solution process.
Although its cost is low, it cannot take into account the uniformity of the film and the production
of a large area, and the control of reproducibility is also poor, which is not conducive to the
commercialization of the product. Therefore, the vacuum deposition process shows its
advantages. Among them, the single-source vacuum deposition has a simple process, does not
need to master too complicated parameters, and requires less equipment. High-quality
perovskite films can also be prepared.
In this study, we build on previous studies on the structure of single-source vacuum
deposition perovskite solar cell device. Using SEM, UV-vis, XRD and other equipment analysis
to optimize the composition of the film, and then discuss the influence of thickness on the
current density. And then we use pressure-assisted annealing process to improve the film quality
and increase grain size. Successfully increased the Jsc of the device. Finally, we obtained
PCE=10.80%, Voc=1.49V, Jsc=9.55mA/cm2
, FF=75.83% under the structure of FTO/cTiO2/m-TiO2/CsPbBr3/C.
After 30 days of storage, it still has 87% of the original efficiency. And has 85% of the bestefficiency device with four times the electrode area. Shows great environment resistance and
film quality | en_US |