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. 2021 Jun 2;8(15):2003728. doi: 10.1002/advs.202003728

Figure 2.

Figure 2

Characterizations of CsPbBr3:Eu GC as X‐ray scintillator. a) Radioluminescence (RL) spectra of CsPbBr3 GC, CsPbBr3:1.5%Eu GC (optimal concentration of Eu dopant) under X‐ray excitation with a dose rate of 189 µGyair s−1 at a voltage of 50 kV. The absorption spectra is also included to demonstrate the self‐absorption issue. b) RL intensity dependence on X‐ray irradiation. c) X‐ray attenuation efficiency of CsPbBr3 GC, CsPbBr3:1.5%Eu GC, commercial CsI:TI, and LuAG:Ge. d) Steady‐state light yield calculation of our optimized CsPbBr3:1.5%Eu GC, commercial LuAG:Ge, inset figure is the measurement setup with integrating sphere. e) Afterglows of CsPbBr3 GC scintillators with and without Eu dopant, compared with widely‐used CsI:TI commercial scintillator. f) Photograph of CsPbBr3:1.5%Eu GC under X‐ray illumination (dose rate of 189 µGyair s−1, voltage: 50 KV).