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However, achieving high carrier mobility and broadband response in organic semiconductors for OPTs remains a challenge. In this work, a new fused diketopyrrolopyrrole (\n                    <jats:bold>FDPP<\/jats:bold>\n                    ) derivative is reported, 2,9\u2010bis(4\u2010hexylphenyl)\u20107H,14H\u2010thieno[3\u2032,2\u2032:7,8]indolizino[2,1\u2010\n                    <jats:italic>a<\/jats:italic>\n                    ]thieno[3,2\u2010\n                    <jats:italic>g<\/jats:italic>\n                    ]indolizine\u20107,14\u2010dione (\n                    <jats:bold>\n                      FDPP\u2010\n                      <jats:italic>p<\/jats:italic>\n                      \u2010C6\n                    <\/jats:bold>\n                    ), synthesized through\n                    <jats:italic>N<\/jats:italic>\n                    \u2010cyclization of DPP with an adjacent thiophene unit. This\n                    <jats:italic>N<\/jats:italic>\n                    \u2010cyclization ensures backbone planarity, while the hexyl side chains remain distant from the fused core, minimizing steric hindrance and promoting efficient intermolecular stacking. Consequently, single crystals of\n                    <jats:bold>\n                      FDPP\u2010\n                      <jats:italic>p<\/jats:italic>\n                      \u2010C6\n                    <\/jats:bold>\n                    exhibit a planar backbone and a typical herringbone packing arrangement, facilitating charge transport. The single\u2010crystal organic field\u2010effect transistors (OFETs) demonstrate\n                    <jats:italic>p<\/jats:italic>\n                    \u2010type charge transport, achieving maximum mobility of 0.20\u00a0cm\n                    <jats:sup>2<\/jats:sup>\n                    \u00a0V\n                    <jats:sup>\u2212<\/jats:sup>\n                    \u00b9\u00a0s\n                    <jats:sup>\u2212<\/jats:sup>\n                    \u00b9. Additionally, the single\u2010crystal OPTs show promising performance, with high responsivity across a broad spectral range and a photoresponsivity of 2.2\u00a0\u00d7\u00a010\n                    <jats:sup>3<\/jats:sup>\n                    \u00a0A\u00a0W\n                    <jats:sup>\u2212<\/jats:sup>\n                    \u00b9 along with a specific detectivity, derived from the noise current, of 2.8\u00a0\u00d7\u00a010\n                    <jats:sup>10<\/jats:sup>\n                    Jones. This study highlights the potential of\n                    <jats:bold>FDPP<\/jats:bold>\n                    as a key material for advancing single\u2010crystal OFET and OPT technologies, propelling relevant research forward.\n                  <\/jats:p>","DOI":"10.1002\/smtd.202402250","type":"journal-article","created":{"date-parts":[[2025,3,23]],"date-time":"2025-03-23T08:43:20Z","timestamp":1742719400000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["A Fused Diketopyrrolopyrrole Derivative for Single\u2010Crystal Visible\u2010NIR Organic Phototransistor"],"prefix":"10.1002","volume":"9","author":[{"given":"Tianqiang","family":"Cui","sequence":"first","affiliation":[{"name":"State Key Laboratory of Applied Organic Chemistry (SKLAOC) Key Laboratory of Special Function Materials and Structure Design (MOE) College of Chemistry and Chemical Engineering Lanzhou University  Lanzhou 730000 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