Tunable Open Circuit Voltage by Engineering Inorganic Cesium Lead Bromide/Iodide Perovskite Solar Cells.

ABSTRACT: Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr_3-xI _x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient condition to design the variations of wide band gap light absorbers. A device with high overall photoconversion efficiency of 3.98 % was obtained when small amount of iodide (CsPbBr_2.9I_0.1) was used as the perovskite and spiro-OMeTAD as the hole transport material (HTM). We investigated the origin of variation in open circuit voltage, V_oc which was shown to be mainly dependent on two factors, which are the band gap of the perovskite and the work function of the HTM. An increment in V_oc was observed for t

SUBMITTER: Ng CH 

PROVIDER: S-EPMC5802841 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature