Performance and stability-enhanced inorganic perovskite light-emitting devices by employing triton X-100* *Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305900 and 2016YFA0300404), the National Natural Science Foundation of China (Grant Nos. 11874172, 11374120, 11634004, and 51320105007), and the Science and Technology Innovative Research Project of Jilin University, China (Grant No. 2017TD-01).

Abstract

Significantly enhanced electroluminescence performance and stability of all-inorganic perovskite light-emitting devices (PeLEDs) have been achieved by adding triton X-100 into the perovskite precursors. The small perovskite grains arranged tightly and formed large grains as the triton X-100 were introduced. Thus the nonradiative defects originated from Pb atoms at the grain boundaries were highly passivated by triton X-100 and resulted in the promotion of PeLED performance, including a turn-on voltage of 3.2 V, a brightness of 63500 cd/m2, a current efficiency of 17.4 cd/A, and a prolonged lifetime of 2 h in air.