Abstract: A method to increase the efficiency of a solar cell comprises depositing a pyroelectric film on a surface of the solar cell and generating an electromotive force to bias the solar cell. The method also includes creation of an open circuit voltage. Further, the method includes increasing a short circuit current through the pyroelectric film and creating a sustained temperature variation in the solar cell. A constant temporal temperate gradient is created in the pyroelectric film to increase the short circuit current with a temperature. Further, a p-n junction is biased with the electromotive force produced from the pyroelectric film.

Abstract: A method includes activating a tamper monitoring circuit of a security seal configured to securely lock a utility meter. The method also includes wirelessly transmitting an identification data and/or an integrity information associated with the security seal and/or the utility meter to the external transceiver upon activating the tamper monitoring circuit or being queried by the external transceiver through a transceiver of the tamper monitoring circuit. The transceiver of the tamper monitoring circuit and the external transceiver are configured to securely communicate with each other through a secure protocol. Further, the method includes detecting a tamper condition associated with tampering of the security seal through the tamper monitoring circuit, and wirelessly transmitting data associated with the tamper condition to the external transceiver.