A mixed-cation lead iodide MA1−xEAxPbI3 absorber for perovskite solar cells

The ethylammonium (EA) with similar size as formamidinium (FA) was successfully fabricated into a mixed-cation perovskite of MA1-xEAxPbI3. Interestingly, the EA-MA mixed-cation perovskite exhibites the different material and device properties from the FA-MA one.123