1. School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
2. Rolls‐Royce@NTU Corporate Lab Nanyang Technological University Singapore 639798 Singapore
3. School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore
4. Innovative Centre for Flexible Devices (iFLEX) Nanyang Technological University Singapore 639798 Singapore