Digital marking using a bipolar imaging member

A bipolar imaging member comprising:

• a substrate;
• a plurality of charge injection pixels disposed over the substrate, wherein each pixel of the plurality of charge injection pixels is separately insulated from all other pixels, and is individually addressable and comprises one or more functionalized nano-carbon-containing materials dispersed in one or more organic conjugated polymers;
• a single-layer, bipolar charge transport layer (CTL), wherein the bipolar CTL is comprised of at least one functionalized nano-carbon-containing material and is disposed over at least one pixel of the plurality of charge injection pixels and is configured to transport both holes and electrons provided by the underlying pixel, in response to an electrical bias, to a surface of the bipolar CTL opposing an interface of the bipolar CTL with the underlying pixel;
• and
• a plurality of thin film transistors disposed over the substrate such that each thin film transistor is connected to one or more pixels of the plurality of charge injection pixels to provide the electrical bias.