Visualization of Nanocrystallites in Organic Semiconducting Blends Using Cryo‐Electron Microscopy

• DOI: 10.1002/smtd.202301352
• Publication Date: 2024-02-13T12:26:00Z
• Authors: Urvashi Bothra; Hariprasad Venugopal; Dinesh Kabra; Christopher R. Mc...; Amelia C. Y. Liu
• Keywords: Texture (cosmology); Characterization; Acceptor

Abstract The efficiency of an organic solar cell is highly dependent on the complex, interpenetrating morphology, and molecular order within composite phases bulk heterojunction (BHJ) blend. Both these microstructural aspects are strongly influenced by processing conditions chemical design donor/acceptor materials. To establish improved structure‐function relationships, it vital to visualize local provide specific information about interfaces crystalline texture in BHJ blend films. visualization nanocrystallites, however, difficult due complex semi‐crystalline structure with few characterization techniques capable visualizing ordering soft materials at nanoscale. Here, demonstrated how cryo‐electron microscopy can be utilized nanoscale order. This method used understand distribution/orientation crystallites a Long‐range (>300 nm) texturing IEICO‐4F oriented edge‐on fashion observed, which has not previously been observed for spin‐coated approach provides wealth quantitative size charge generation transport film. study guides tailoring material high‐performance optoelectronic devices.