An anthracene derivative having a specific asymmetric structure is provided. In some implementations, service provisioning can be facilitated in cases wherein the payment processor must reside in a strictly regulated Payment Card Industry compliant environment and the service providers operate servers that are not PCI-compliant. The installation can be accomplished without further user input. The secondary payload interface may be designed such that control and telemetry interactions with the operators of the communications satellite are limited. Accordingly, shrinking of the cathode during operation can be prevented, and the distance between the cathode and a G1 electrode can be maintained uniform, so that the life of the cathode can be greatly extended, and a stable electron emission characteristic can be realized.