The rapid development of electronics allowed conveniences and drastically changed social life [
1–
4]. However, the problem of electronic waste becomes increasingly prominent as electronic products are quickly upgraded [
5]. To alleviate the electronic waste pollution, many scientists focused on paper-based electronics [
6,
7] such as sensors [
8,
9], micro-electromechanical system [
10], and transistors [
11,
12], because of their superiority in terms of biodegradability, low cost, foldability, flexibility, and light weight. The power sources are a key factor which confines the development of paper-based electronics. Traditional bulky batteries and capacitors cannot support the concept of “green electronics”. Thus, paper-based power sources that work independently and sustainably, such as lithium battery [
13,
14], supercapacitor [
15–
17], solar cell [
18], piezoelectric generator [
19–
22], and electrostatic generator [
23–
26], are designed and proposed to build all paper-based systems. Paper-based electrostatic generators, including triboelectric generator [
23,
24] and electret generators [
25,
26], are a quite new alternative technology to convert mechanical energy in the ambient environment into electricity. This generator is easily fabricated and highly reliable. For example, Wang et al. developed origami triboelectric generators that can harvest ambient mechanical energy from various human motions and can also serve as self-powered pressure sensors [
25]. Zhou et al. introduced a paper-based electret generator that can be attached onto movable objects to harvest energy [
26]. These studies indicated the significant potential applications of a paper-based self-powered system as an energy source or as an active sensor. Although some low-power consumption electronics have been successfully driven by previous paper-based generators, their output ability still needs to be promoted as electricity demand of electronics escalates.