Aluminum(III)bis(2-methyl-8-quninolinato)-4-phenylphenolate (BAlq$_{2}$), as hole blocking layer (HBL), 2,2’,7,7’-tetrakis-(N,N- diphenylamino)-9,9’-spirobifluorene (Spiro-TAD) or N,N $^{′}$-Di(naphthalen-1-yl)-N,N$^{′}$-diphenyl-benzidine (NPB) for the elec- tron blocking layer (EBL). Red emission is obtained either by Iridium(III)bis(2-methyldibenzo-[f,h]chinoxalin)(acetylacetonat) (Ir(MDQ)$_{2}$(acac)) or Tris(1-phenylisoquinoline)iridium(III) (Ir(piq)$_{3}$). Both are phosphorescent emitters, which are doped into a matrix of NPB with 10 wt%, each. Details about device architecture and layer thicknesses are provided in the supplementary information, Fig. S1. Characterization. Even though the final device is AC driven to enable active beam-shaping, a complete characterization of each subunit is done under DC conditions. Electro-optical performance, as current and luminance against voltage, is measured using a source measure unit (SMU2400, Keithley Instruments) combined with a calibrated spectrometer (CAS140, Instrument Systems GmbH). Angularly-resolved measurements are done using a spectro-goniometer setup that measures the irradiance with a calibrated USB-spectrometer (USB4000, Ocean Optics Inc.). Here, the OLED is mounted on a rotary table and the spectrometer is at a constant distance to the device. The information from this measurement is also used to calculate correct efficiency values, which is in this case indispensable due to the highly non-Lambertian behaviour of the samples. To get an image of the beam shape another setup has been developed. In this case the OLED illuminates a flat, diffusive screen. Using a digital single-lens reflex camera (EOS-D30, Canon) and subsequent image evaluation tools, the brightness distribution can be analysed. For evaluation, the spectra are flattened using a FFT lowpass filter. Asymmetries in the profiles hint that the screen was not perfectly parallel to the OLED. Therefore, the mean value of both maxima has to be used. The power supply for the PWM is obtained by an arbitrary waveform generator (33220A, Agilent Technologies) and a subsequent 5 MHz high voltage amplifier (WMA 300, Falco Systems). References [1] Dickey, F. M. Laser Beam Shaping: Theory and Techniques (CRC Press, Taylor & Francis Group, Boca Raton, London, New York, 2nd ed., 2014). [2] Wei, C., Lu, X., Wu, G., Wang, F. & Cai, Y. A new method for generating a hollow Gaussian beam, Appl. Phys. B 115 , 55-60 (2014). [3] Fournier, F. R. A review of beam shaping strategies for LED lighting Proc. SPIE 8170 , 817007-1 - 817007-11 (2011). [4] Lozano, G., Rodriguez, S. R. K., Verschuuren, M. A. & Rivas, J. G., Metallic nanostructures for efficient LED lighting Light Sci. Appl. 5 , e16080 (2016). [5] Reineke, S., Thomschke, M., L¨ ussem, B. & Leo, K. White organic light-emitting diodes: Status and perspective Rev. Mod. Phys. 85 , 1245-1293 (2103). [6] Gather, M .C. & Reineke, S. Recent advances in light outcoupling from white organic light-emitting diodes J. Photon. Energy 1 , 057607 (2015). 11