“…The in-plane κ of various molecular thin films ( pentacene, TPD, Alq3, C 60 , PCBM, rubrene, DNTT, ….) 4, [18][19][20][21][22][23][24][25][26] has been measured in the range 0.1-0.8 W m −1 K −1 at the macroscale (ac-calorimetry, 3ω Joule heating, time domain thermo-reflec-tance….). Only a very few reports have been published on the out-of-plane κ of these organic materials at the nanoscale, e.g.…”