
{"id":2269,"date":"2019-01-28T11:07:44","date_gmt":"2019-01-28T11:07:44","guid":{"rendered":"https:\/\/www.editage.com\/insights\/semiconductor-for-making-the-thin-film-transistors-that-everyones-been-looking-for\/"},"modified":"2025-02-21T05:19:17","modified_gmt":"2025-02-21T05:19:17","slug":"semiconductor-for-making-the-thin-film-transistors-that-everyones-been-looking-for","status":"publish","type":"post","link":"https:\/\/www.editage.com\/insights\/semiconductor-for-making-the-thin-film-transistors-that-everyones-been-looking-for","title":{"rendered":"Semiconductor for making the thin-film transistors that everyone&#8217;s been looking for"},"content":{"rendered":"<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">Scientists at Dongguk University have found a way to create printed p-channel thin-film transistors by using the abundantly available and environmentally friendly copper(I) iodide semiconductor at room temperature. Their energy-efficient and cost-effective fabrication method for these transistors may pave the way for developing low-cost and novel optoelectronic devices.<\/span><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\"> <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">Transistors are the building blocks of most of the electronic devices we use every day, and research on fabricating new types of semiconducting materials for thin-film transistors (TFIs) has been ongoing for decades. Whenever new transistors or novel fabrication methods are discovered, many previously impossible applications become feasible, such as ultrahigh-definition transparent displays and flexible electronic devices. Nowadays, there is a huge demand for p-type transparent semiconductors (which are conductive due to the movement of charge carriers called \u201choles\u201d) for making p-channel transistors, but when compared to the n-type counterparts, their use is limited by chemical instability and poor electric properties. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">To overcome these limitations, a research team at Dongguk University led by Prof. Yong-Young Noh focused on developing a p-type transparent semiconductor for TFTs using a metal halide like copper(I) iodide (CuI), instead of metal oxide. \u201cThe naturally abundant and environment friendly constitutional elements of CuI make it more appropriate for large-scale printed transparent electronics. More importantly, CuI has higher hole mobility than other p-type oxide-based semiconductors,\u201d explains Prof. Noh.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">However, CuI had been barely used as a semiconductor for TFTs because its hole concentration is so high that it results in uncontrollable conductivity (transistors are generally meant to be easily turned on and off at high speeds, that is, they are meant to be switchable from a conductive to a non-conductive state). Moreover, standard solution-based processing for making thin films generally requires a heat treatment called \u201cannealing,\u201d which is energy and time-consuming.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span lang=\"EN-US\" style=\"font-size:12.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">The researchers found out that it is possible to reduce the conductivity of CuI-based thin films by making them even thinner and thus suitable for fabricating TFTs with the performance that is currently in demand for many applications. Additionally, these CuI thin films do not require annealing at all and can be processed at room temperature. This saves energy and makes them more cost-effective. <\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><img decoding=\"async\" alt=\"Default Alt text\" class=\"media-element file-default\" title=\"Default Title Text\" src=\"http:\/\/insights.cactusglobal.com\/sites\/default\/files\/Capture1_7.PNG\" \/><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">The team tested multiple processing conditions and fabricated various different TFTs to determine the origin of the enhanced device properties and to demonstrate the potential uses of CuI as a thin-film p-type semiconductor. \u201cWe believe that this work opens the \ufb02oodgate for room-temperature, low-cost, printed transparent p-type transistors for diverse optoelectronic devices,\u201d concludes Prof. Noh.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><b><span lang=\"EN-US\" style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\" xml:lang=\"EN-US\">Reference<\/span><\/b><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<table class=\"Table\" style=\"border-collapse:collapse; border:undefined\">\n<tbody>\n<tr>\n<td style=\"width:85.05pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"113\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Authors:<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:382.95pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"511\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Ao Liu<sup>1<\/sup>, Huihui Zhu<sup>1<\/sup>, Won-Tae Park<sup>1<\/sup>, Seok-Ju Kang<sup>1<\/sup>, Yong Xu*<sup>1<\/sup>, Myung-Gil Kim*<sup>2<\/sup>, and Yong-Young Noh*<sup>1<\/sup><\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width:85.05pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"113\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Title of original paper:<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:382.95pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"511\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Room-Temperature Solution-Synthesized p-Type Copper(I) Iodide Semiconductors for Transparent Thin-Film Transistors and Complementary Electronics <\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width:85.05pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"113\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Journal:<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:382.95pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"511\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><i><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Advanced Materials <\/span><\/span><\/i><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width:85.05pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"113\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">DOI:<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:382.95pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"511\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">10.1002\/adma.201802379<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"height:.45in\">\n<td style=\"width:85.05pt; padding:0in 0in 0in 0in; height:.45in\" valign=\"top\" width=\"113\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Affiliations:<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:382.95pt; padding:0in 0in 0in 0in; height:.45in\" valign=\"top\" width=\"511\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><sup><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">1<\/span><\/span><\/sup><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Department of Energy and Materials Engineering, Dongguk University \u00a0<\/span><\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><sup><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">2<\/span><\/span><\/sup><span lang=\"EN-US\" style=\"font-size:11.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Department of Chemistry, Chung-Ang University<\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p><span lang=\"EN-US\" style=\"font-size:12.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Check out the article source<\/span><\/span><strong><span lang=\"EN-US\" style=\"font-size:12.0pt\" xml:lang=\"EN-US\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\"> <a href=\"https:\/\/www.dongguk.edu\/mbs\/en\/jsp\/board\/view.jsp?spage=1&amp;boardId=63820&amp;boardSeq=26670186&amp;id=en_050200000000&amp;column=&amp;search\">here<\/a>.\u00a0<\/span><\/span><\/strong><\/p>\n<p style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\"><b>About <\/b><b>Dongguk University<\/b><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"margin-top:2.0pt; margin-right:0in; margin-bottom:2.0pt; margin-left:0in; text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"text-autospace:none\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;\">Dongguk University, founded in 1906, is located in Seoul, South Korea. It comprises 13 colleges that cover a variety of disciplines and has local campuses in Gyeongju, Goyang, and Los Angeles. The university has 1300 professors who conduct independent research and 18000 students undertaking studies in a variety of disciplines. Interaction between disciplines is one of the strengths on which Dongguk prides itself; the university encourages researchers to work across disciplines in Information Technology, Bio Technology, CT, and Buddhism.<\/span> <\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scientists at Dongguk University have found a way to create printed p-channel thin-film transistors by using the abundantly available and environmentally friendly copper(I) iodide semiconductor at room temperature. Their energy-efficient and cost-effective fabrication method for these transistors may pave the way for developing low-cost and novel optoelectronic devices. \u00a0 Transistors are the building blocks of [&hellip;]<\/p>\n","protected":false},"author":1152,"featured_media":33313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2435],"tags":[2482],"new_categories":[],"new_tags":[],"series":[],"class_list":["post-2269","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trending-research","tag-science-update"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Semiconductor for making the thin-film transistors that everyone&#039;s been looking for | Editage Insights<\/title>\n<meta name=\"description\" content=\"Dongguk University has created printed p-channel thin-film transistors using environmentally friendly copper iodide semiconductor. 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