Combinatorial fabrication and screening of organic light-emitting device arrays

Combinatorial approaches for discovery and optimization of new materials have emerged as a powerful tool for a wide range of applications in fields such as catalysis, optoelectronics, and luminescence.1 The multiplicity of parameters that affect device performance makes combinatorial approaches an important tool for device development as well. Indeed, in recent years, such approaches have proven useful in fabrication, optimization, and basic studies of organic light-emitting devices (OLEDs).2-10 This chapter reviews these studies, with particular emphasis on the studies conducted by the authors, which include two-dimensional (2-D) combinatorial arrays of UV-violet OLEDs,5,11 1-D arrays of red-to-blue OLEDs,7 1-D combinatorial screening of white OLEDs,8 and 1-D combinatorial arrays fabricated to study Förster energy transfer in doped OLEDs.9.