1. L. Gu, N. Cui, L. Cheng, Q. Xu, S. Bai, M. Yuan, W. Wu, J. Liu and et al, “Flexible Fiber Nanogenerator with 209 V Output Voltage Directly Powers a Light-Emitting Diode”, Nano Letters, Vol. 13, No. 1, pp. 91-94 (2013),
https://doi.org/10.1021/nl303539c.
2. G. Zhu, R. Yang, S. Wang and Z. L. Wang, “Flexible High-Output Nanogenerator Based on Lateral ZnO Nanowire Array”, Nano Letters, Vol. 10, No. 8, pp. 3151-3155 (2010),
https://doi.org/10.1021/nl101973h.
3. J. -H. Ryu, J. -E. Kang, Y. Zhou, S. -Y. Choi, W. -H. Yoon, D. -S. Park, J. -J. Choi, B. -D. Hahn and et al, “Ubiquitous Magnetomechano-electric Generator”, Energy & Environmental Science, Vol. 8, pp. 2402-2408 (2015),
https://doi.org/10.1039/C5EE00414D.
4. C. R. Bowen, H. A. Kim, P. M. Weaver and S. Dunn, “Piezoelectric and Ferroelectric Materials and Structures for Energy Harvesting Applications”, Energy & Environmental Science, Vol. 7, pp. 25-44 (2014),
https://doi.org/10.1039/C3EE42454E.
5. M. -B. Lee, J. -H. Bae, J. -H. Lee, C. -S. Lee, S. -H. Hong and Z. L. Wang, “Self-powered Environmental Sensor System Driven by Nanogenerators”, Energy & Environmental Science, Vol. 4, pp. 3359-3363 (2011),
https://doi.org/10.1039/C1EE01558C.
6. L. Lin, Y. Hu, C. Xu, Y. Zhang, R. Zhang, X. Wen and Z. L. Wang, “Transparent Flexible Nanogenerator as Self-powered Sensor for Transportation Monitoring”, Nano Energy, Vol. 2, No. 1, pp. 75-81 (2013),
https://doi.org/10.1016/j.nanoen.2012.07.019.
7. Y. Hu, Y. Zhang, C. Xu, L. Lin, R. L. Snyder and Z. L. Wang, “Self-Powered System with Wireless Data Transmission”, Nano Letters, Vol. 11, No. 6, pp. 2572-2577 (2011),
https://doi.org/10.1021/nl201505c.
8. I. -T. Seo, Y. -J. Cha, I. -Y. Kang, J. -H. Choi, S. Nahm, T. -H. Seung and J. -H. Paik, “High Energy Density Piezoelectric Ceramics for Energy Harvesting Devices”, Journal of the American Ceramic Society, Vol. 94, No. 11, pp. 3629-3631 (2011),
https://doi.org/10.1111/j.1551-2916.2011.04817.x.
9. B. Satish, K. Sridevi and M. Vijaya, “Study of Piezoelectric and Dielectric Properties of Ferroelectric PZT-polymer Composites Prepared by Hot-press Technique”, Journal of Physics D: Applied Physics, Vol. 35, No. 16, pp. 2048-2050 (2002).
10. Y. Yan, J. E. Zhou, D. Maurya, Y. U. Wang and S. Priya, “Giant Piezoelectric Voltage Coefficient in Grain-oriented Modified PbTiO
3 Material”, Nature communications, Vol. 7, pp. 1-10 (2016),
https://doi.org/10.1038/ncomms13089.
11. C. -W. Ahn, M. Karmarkar, D. Viehland, D. -H. Kang, K. -S. Bae and S. Priya, “Low Temperature Sintering and Piezoelectric Properties of CuO-doped (K0.5Na0.5) NbO
3 Ceramics”, Ferroelectric Letters Section, Vol. 35, pp. 3-4-66 (72),
https://doi.org/10.1080/07315170802353058.
12. C. -W. Ahn, H. -C. Song, S. -H. Park, S. Nahm, K. Uchino, S. Priya, H. -G. Lee and N. -K. Kang, “Low Temperature Sintering and Piezoelectric Properties in Pb (ZrxTi1-x) O
3-Pb (Zn1/3Nb2/3) O
3-Pb (Ni1/3Nb2/3) O
3 Ceramics”, Japanese Journal of Applied Physics, Vol. 44, No. 3, pp. 1314-1321 (2005),
https://doi.org/10.1143/JJAP.44.1314.
13. Y. Qi, J.-H. Kim, T. D. Nguyen, B. Lisko, P. K. Purohit and M. C. McAlpine, “Enhanced Piezoelectricity and Stretchability in Energy Harvesting Devices Fabricated from Buckled PZT Ribbons”, Nano Letters, Vol. 11, No. 3R, pp. 1331-1336 (2005),
https://doi.org/10.1143/JJAP.44.1314.
14. S. -Y. Chung, S. -Y. Kim, J. -H. Lee, K. -J. Kim, S. -W. Kim, C. -Y. Kang, S. -J. Yoon and Y. -S. Kim, “All-Solution-Processed Flexible Thin Film Piezoelectric Nanogenerator”, Advanced Materials, Vol. 24, No. 45, pp. 6022-6027 (2012),
https://doi.org/10.1002/adma.201202708.
15. E. A. Patterson and D. P. Cann, “Bipolar Piezoelectric Fatigue of Bi(Zn0.5Ti0.5)O
3-(Bi0.5K0.5)TiO
3-(Bi0.5Na0.5)TiO
3 Pb-free Ceramics”, Applied Physics Lettes, Vol. 101, No. 4, pp. 042905(2012),
https://doi.org/10.1063/1.4738770.
16. J. -H. Kim, H. -U. Ko, S. -C. Mun, J. -H. Kim and H. -S. Kim, “Recent Advancement of Piezoelectric Energy Harvesting”, Korean Industrial Chemistry News, Vol. 16, No. 4, pp. 27-34 (2013).
17. K. -B. Kim, C. -I. Kim, Y. -H. Jeong, Y. -J. Lee, J. -H. Cho, J. -H. Paik and S. Nam, “Performance of Unimorph Cantilever Generator Using Cr/Nb Doped Pb(Zr0.54Ti0.46)O
3 Thick Film for Energy Harvesting Device Applications”, Journal of the European Ceramic Society, Vol. 33, No. 2, pp. 305-311 (2013),
https://doi.org/10.1016/j.jeurceramsoc.2012.09.001.
18. R. C. Kambale, W. -H. Yoon, D. -S. Park, J. -J. Choi, C. -W. Ahn, J. -W. Kim, B. -D. Hahn, D. -Y. Jeong and et al, “Magnetoelectric Properties and Magnetomechanical Energy Harvesting from Stray Vibration and Electromagnetic Wave by Pb(Mg1/2Nb2/3) O
3-Pb(Zr,Ti) O
3 single crystal/Ni cantilever”, Journal of Applied Physics, Vol. 113, No. 20, pp. 204108(2013),
https://doi.org/10.1063/1.4804959.
19. S. -H. Shin, Y. -H. Kim, M. -H. Lee, J. -Y. Jung and J. -H. Nah, “Hemispherically Aggregated BaTiO
3 Nanoparticle Composite Thin Film for High-Performance Flexible Piezoelectric Nanogenerator”, ACS Nano, Vol. 8, No. 3, pp. 2766-2773 (2014),
https://doi.org/10.1021/nn406481k.
20. C. -K. Jeong, I. -S. Kim, K. -I. Park, M. -H. Oh, H. -M. Paik, G. -T. Hwang, K. -S. Nom, Y. S. Nam and et al, “Virus-Directed Design of a Flexible BaTiO
3 Nanogenerator”, ACS Nano, Vol. 7, No. 12, pp. 11016-11025 (2013),
https://doi.org/10.1021/nn404659d.
21. J. -S. Chun, N. -R. Kang, J. -Y. Kim, M. -S. Noh, C. -Y. Kang, D. -H. Choi, S. -W. Kim, Z. L. Wang and et al, “Highly Anisotropic Power Generation in Piezoelectric Hemispheres Composed Stretchable Composite Film for Self-powered Motion Sensor”, Nano Energy, Vol. 11, pp. 1-10 (2015),
https://doi.org/10.1016/j.nanoen.2014.10.010.
22. Y. Bai, H. Jantunen and J. Juuti, “Energy Harvesting Research: The Road from Single Source to Multisource”, Advanced Materials, Vol. 30, No. 34, pp. 1707271(2018),
https://doi.org/10.1002/adma.201707271.
23. H. -G. Yeo, X. Ma, C. Rahn and S. Trolier-McKinstry, “Efficient Piezoelectric Energy Harvesters Utilizing (001) Textured Bimorph PZT Films on Flexible Metal Foils”, Advanced Functional Materials, Vol. 26, No. 32, pp. 5940-5946 (2016),
https://doi.org/10.1002/adfm.201601347.
24. S. -W. Jang, "A Study on the Test Development of Self-generating Wireless Temperature Sensor Network utilizing Pb-free Energy Harvesting Technology", Master’s Thesis, Pukyong National University (2019).