{"id":186,"date":"2022-04-02T06:53:37","date_gmt":"2022-04-01T21:53:37","guid":{"rendered":"https:\/\/umeshinlab.wordpress.com\/?page_id=186"},"modified":"2026-08-12T08:34:23","modified_gmt":"2026-08-12T08:34:23","slug":"printed-electronics","status":"publish","type":"page","link":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/printed-electronics\/","title":{"rendered":"Printed Electronics"},"content":{"rendered":"\n<p class=\"has-small-font-size wp-block-paragraph\">Printed electronics revolutionize traditional manufacturing processes by using printing techniques to fabricate electronic devices, including innovative solar cells like perovskite and organic variants. Perovskite solar cells are crafted using a special class of materials called perovskites, which possess excellent light-absorbing properties. These cells can be created through printing methods like inkjet printing or slot-die coating, allowing for the deposition of perovskite materials onto flexible or rigid substrates in a cost-effective manner. Perovskite solar cells offer high efficiency and potential for low-cost production, making them promising candidates for next-generation solar technology due to their ability to convert sunlight into electricity efficiently.<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Organic solar cells utilize organic (carbon-based) materials to generate electricity from sunlight. They are fabricated through printing techniques like roll-to-roll printing or screen printing, enabling the deposition of organic semiconductors onto flexible substrates. Organic solar cells are lightweight, flexible, and semi-transparent, allowing for applications in various settings, including building-integrated photovoltaics and wearable electronics. While currently less efficient than traditional silicon solar cells, ongoing research aims to enhance their performance and stability, promoting their use as a sustainable and versatile energy solution.<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"218\" src=\"https:\/\/new.umeshin.mmech.waseda.ac.jp\/wp-content\/uploads\/2023\/12\/banner-print.png?w=960\" alt=\"\" class=\"wp-image-1071\" srcset=\"https:\/\/umeshin.mmech.waseda.ac.jp\/wp-content\/uploads\/2023\/12\/banner-print.png 960w, https:\/\/umeshin.mmech.waseda.ac.jp\/wp-content\/uploads\/2023\/12\/banner-print-300x68.png 300w, https:\/\/umeshin.mmech.waseda.ac.jp\/wp-content\/uploads\/2023\/12\/banner-print-768x174.png 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-huge-font-size\">Repository<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Robust Full\u2010Surface Bonding of Substrate and Electrode for Ultra\u2010Flexible Sensor Integration<\/strong><br>Published: 2025 | <em>Advanced Materials<\/em>, 37(49), 2417590 (cover article e71335)<br>Authors: Masahito Takakuwa, Daishi Inoue, Lulu Sun, Michitaka Yamamoto, Shinjiro Umezu, Daisuke Hashizume, Toshihiro Itoh, Kenjiro Fukuda, Takao Someya, Tomoyuki Yokota<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Develops a full-surface bonding process joining substrate and electrode across their entire contact area rather than at discrete points, improving mechanical robustness and electrical reliability for ultra-flexible sensor integration \u2014 extending the group&#8217;s earlier direct gold\/silver conductive-bonding work toward more durable flexible electronic assemblies.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Direct Conductive Bonding of Silver Electrodes on Ultrathin Polymer Films<\/strong><br>Published: 2024 | <em>ACS Applied Electronic Materials<\/em>, 6(10), 7261-7267<br>Authors: Tatsuma Miyake, Masahito Takakuwa, Daishi Inoue, Daisuke Hashizume, Tomoyuki Yokota, Shinjiro Umezu, Kenjiro Fukuda, Takao Someya<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Demonstrates direct conductive bonding of silver electrodes onto ultrathin polymer films without an intermediate adhesive layer, achieving reliable electrical contact while preserving the film&#8217;s flexibility \u2014 a lower-cost silver-based counterpart to the group&#8217;s earlier gold-bonding technique.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Unleashing the Potential of Industry Viable Roll-to-Roll Compatible Technologies for Perovskite Solar Cells: Challenges and Prospects<\/strong><br>Published: 2024 | <em>Materials Today<\/em>, 78, 112-141<br>Authors: Marc Josep Montagut Marques, Weiye Lin, Tetsuya Taima, Shinjiro Umezu, Md. Shahiduzzaman<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Review examining roll-to-roll compatible manufacturing technologies for perovskite solar cells, assessing which fabrication techniques are scalable for industrial, continuous-process production and identifying the key technical challenges standing between lab-scale perovskite photovoltaics and mass manufacturing.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Direct Gold Bonding for Flexible Integrated Electronics<\/strong><br>Published: 2021 | <em>Science Advances<\/em>, 7(52), eabl6228<br>Authors: Masahito Takakuwa, Kenjiro Fukuda, Tomoyuki Yokota, Daishi Inoue, Daisuke Hashizume, Shinjiro Umezu, Takao Someya<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Establishes a direct gold-to-gold conductive bonding technique for joining flexible electronic components without solder or adhesive, enabling robust, low-resistance electrical interconnects between ultrathin flexible circuit elements \u2014 a foundational bonding method later extended to silver and full-surface bonding approaches in the group&#8217;s subsequent work.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. An Efficient Ultra\u2010Flexible Photo\u2010Charging System Integrating Organic Photovoltaics and Supercapacitors<\/strong><br>Published: 2020 | <em>Advanced Energy Materials<\/em>, 10(20), 1 (cover article)<br>Authors: Rui Liu, Masahito Takakuwa, Ao Li, Daishi Inoue, Daisuke Hashizume, Kilho Yu, Shinjiro Umezu, and co-authors<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Integrates ultra-flexible organic photovoltaic cells with supercapacitors into a single self-charging power system, demonstrating a lightweight, flexible energy-harvesting-and-storage module suitable for wearable and skin-conformal electronics.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Printed electronics revolutionize traditional manufacturing processes by using printing techniques to fabricate electronic devices, including innovative solar cells like perovskite and organic variants. Perovskite solar cells are crafted using a special class of materials called perovskites, which possess excellent light-absorbing properties. These cells can be created through printing methods like inkjet printing or slot-die coating, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-186","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/pages\/186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/comments?post=186"}],"version-history":[{"count":3,"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/pages\/186\/revisions"}],"predecessor-version":[{"id":1472,"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/pages\/186\/revisions\/1472"}],"wp:attachment":[{"href":"https:\/\/umeshin.mmech.waseda.ac.jp\/index.php\/wp-json\/wp\/v2\/media?parent=186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}