Improvement of electron injection of organic light-emitting devices by inserting a thin aluminum layer into cesium carbonate injection layer<xref ref-type="fn" rid="cpb142257fn1">*</xref>

Improvement of electron injection of organic light-emitting devices by inserting a thin aluminum layer into cesium carbonate injection layer*

Xin Li-Wen^a),^b),^c), Wu Xiao-Ming^a),^b),^c)†, Hua Yu-Lin^a),^b),^c)‡, Xiao Zhi-Hui^a),^b),^c), Wang Li^a),^b),^c), Zhang Xin^a),^b),^c), Yin Shou-Gen^a),^b),^c)

(a) Current density–voltage–luminance characteristics; (b) current efficiency–current density characteristics of device I, device II, device A (0.4 nm), device B (0.8 nm), device C (1.2 nm), and device D (1.6 nm).