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In situ characterization of\n                    <jats:bold>PTB7<\/jats:bold>\n                    film formation from chloroform (CF), chlorobenzene (CB), and 1,2\u2010dichlorobenzene (DCB) solutions, as well as CB solutions with 1% and 3% v\/v of the processing additives 1\u2010chloronapthalene (CN), diphenylether (DPE), and 1,8\u2010diiodooctane (DIO), reveals multiple crystallization pathways with: (i) single\u2010solvent systems exhibiting rapid (&lt;3 s) crystallization after a solvent boiling point\u2010dependent film thinning transition, (ii) solvent + additive systems exhibiting different crystallization pathways and crystallite formation times from minutes (CN, DPE) to 1.5 h (DIO). Identifying crystalline intermediates has implications for bulk\u2010heterojunction PSC morphology optimization via optimized spin\u2010casting processes.\n                  <\/jats:p>","DOI":"10.1002\/adma.201703933","type":"journal-article","created":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T01:36:37Z","timestamp":1507512997000},"source":"Crossref","is-referenced-by-count":97,"title":["In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating"],"prefix":"10.1002","volume":"29","author":[{"given":"Eric F.","family":"Manley","sequence":"first","affiliation":[{"name":"Department of Chemistry and the Argonne\u2010Northwestern Solar Energy Research (ANSER) Center Northwestern University  2145 Sheridan Road Evanston IL 60208 USA"},{"name":"Chemical Sciences and Engineering Division Argonne National Laboratory  9700 South Cass Avenue Lemont IL 60439 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