yes you can. EQE in a LED is defined as how many photons were produced per electron-hole pair recombined. So you can actually calculate how many photons you generated from the EL data (light intensity/device area), and you can calculate how many electron-hole pair recombined from the I-V curve.
For correct EQE calculation a measurement in an integrating sphere is best. If you do not have one, you will at least need to do an angular dependent luminance measurement. Knowing the angular dependence and assuming it to be uniform on the device you can calculate emission for the complete space.
If you have only forward (0° emission) emission data, you will have to assume some emission profile (without strong cavity normally lambertian emission). Having the total emission of your device in W and the average photon energy calculated from the device emission spectrum together with the supply current and electron charge you can calculate EQE.
Please any one can suggest me, that how to calculate the EQE of an OLED from the available data of Luminance (cd/m2) and I-V or J-V curve data of an LED with out using an integrating sphere? I went through few previous conversation, but not clear for me. It will be quite helpful, if any one can help me in this regards.......
Could you explain the method you are using? If I have J-V-L, Current efficiency-Luminance, Power efficiency-Luminance, EL sprectrum, could you explain how can I calculate EQE?