A tandem OLED device includes an anode, a cathode, first and second electroluminescent units disposed between the anode and the cathode, and an intermediate connector disposed between the first and second electroluminescent units. The carrier carries identifying information for identifying an identification subject, and comprises one or more pieces of DNA having a thymine-rich base sequence and having, as the identifying information, an identifying base sequence pre-associated with the identification subject. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners. At least one related wellbore management method creates a fracture in the wellbore and props open the fracture to increase wellbore integrity to utilize higher weight drilling fluids and prevent fractures from forming further down the wellbore.