[1] A Tsumura, H Koezuka, T Ando. Macromolecular electronic device: Field-effect transistor with a polythiophene thin film. Appl Phys Lett, 49, 1210(1986).

[2] L Q Li, P Gao, W C Wang et al. Growth of ultrathin organic semiconductor microstripes with thickness control in the monolayer precision. Angew Chem Int Ed, 52, 12530(2013).

[3] Y B Yuan, G Giri, A L Ayzner et al. Ultra-high mobility transparent organic thin film transistors grown by an off-centre spin-coating method. Nat Commun, 5, 3005(2014).

[4] Y H Zhang, J S Qiao, S Gao et al. Probing carrier transport and structure-property relationship of highly ordered organic semiconductors at the two-dimensional limit. Phys Rev Lett, 116, 016602(2016).

[5] P Lin, F Yan. Organic thin-film transistors for chemical and biological sensing. Adv Mater, 24, 34(2012).

[6] Y van de Burgt, A Melianas, S T Keene et al. Organic electronics for neuromorphic computing. Nat Electron, 1, 386(2018).

[7] H Minemawari, T Yamada, H Matsui et al. Inkjet printing of single-crystal films. Nature, 475, 364(2011).

[8] C L Wang, H L Dong, L Jiang et al. Organic semiconductor crystals. Chem Soc Rev, 47, 422(2018).

[9] Q J Wang, J Qian, Y Li et al. 2D single-crystalline molecular semiconductors with precise layer definition achieved by floating-coffee-ring-driven assembly. Adv Funct Mater, 26, 3191(2016).

[10] J Qian, S Jiang, S L Li et al. Solution-processed 2D molecular crystals: Fabrication techniques, transistor applications, and physics. Adv Mater Technol, 4, 1800182(2019).

[11] A Yamamura, S Watanabe, M Uno et al. Wafer-scale, layer-controlled organic single crystals for high-speed circuit operation. Sci Adv, 4, eaao5758(2018).

[12] S Jiang, J Qian, Y Duan et al. Millimeter-sized two-dimensional molecular crystalline semiconductors with precisely defined molecular layers via interfacial-interaction-modulated self-assembly. J Phys Chem Lett, 9, 6755(2018).

[13] Z W Wang, S J Guo, H W Li et al. The semiconductor/conductor interface piezoresistive effect in an organic transistor for highly sensitive pressure sensors. Adv Mater, 1805630(2018).

[14] W Sun, B Gao, M F Chi et al. Understanding memristive switching via in situ characterization and device modeling. Nat Commun, 10, 3453(2019).

[15] B J Leever, C A Bailey, T J Marks et al. In situ characterization of lifetime and morphology in operating bulk heterojunction organic photovoltaic devices by impedance spectroscopy. Adv Energy Mater, 2, 120(2012).

[16] J Surgailis, A Savva, V Druet et al. Mixed conduction in an N-type organic semiconductor in the absence of hydrophilic side-chains. Adv Funct Mater, 31, 2010165(2021).

[17] S R Walter, J Youn, J D Emery et al. In-situ probe of gate dielectric-semiconductor interfacial order in organic transistors: Origin and control of large performance sensitivities. J Am Chem Soc, 134, 11726(2012).

[18] P Chulkin. In-situ characterisation of charge transport in organic light-emitting diode by impedance spectroscopy. Electron Mater, 2, 253(2021).

[19] D J Yun, S Lee, K Yong et al. In situ ultraviolet photoemission spectroscopy measurement of the pentacene-RuO₂/Ti contact energy structure. Appl Phys Lett, 97, 073303(2010).

[20] R Giridharagopal, L Q Flagg, J S Harrison et al. Electrochemical strain microscopy probes morphology-induced variations in ion uptake and performance in organic electrochemical transistors. Nat Mater, 16, 737(2017).

[21] N Hosono, A Terashima, S Kusaka et al. Highly responsive nature of porous coordination polymer surfaces imaged by in situ atomic force microscopy. Nat Chem, 11, 109(2019).

[22] J C Lee, M Lee, H J Lee et al. Flow patterns: Numerical simulations and in situ optical microscopy connecting flow pattern, crystallization, and thin-film properties for organic transistors with superior device-to-device uniformity. Adv Mater, 32, 2070357(2020).

[23] K S Wienhold, C L Weindl, S S Yin et al. Following in situ the evolution of morphology and optical properties during printing of thin films for application in non-fullerene acceptor based organic solar cells. ACS Appl Mater Interfaces, 12, 40381(2020).

[24] J L Yang, D H Yan. Weak epitaxy growth of organic semiconductor thin films. Chem Soc Rev, 38, 2634(2009).

[25] Y F Yao, H L Dong, W P Hu. Charge transport in organic and polymeric semiconductors for flexible and stretchable devices. Adv Mater, 28, 4513(2016).

[26] Y Diao, L Shaw, Z N Bao et al. Morphology control strategies for solution-processed organic semiconductor thin films. Energy Environ Sci, 7, 2145(2014).

[27] T Minari, C Liu, M Kano et al. Controlled self-assembly of organic semiconductors for solution-based fabrication of organic field-effect transistors. Adv Mater, 24, 299(2012).

[28] A Furchner, D Aulich. Organic materials for optoelectronic applications. Springer Ser Surf Sci, 52, 529(2018).

[29] Y Li, H B Sun, Y Shi et al. Patterning technology for solution-processed organic crystal field-effect transistors. Sci Technol Adv Mater, 15, 024203(2014).

[30] X D Gu, L Shaw, K Gu et al. The meniscus-guided deposition of semiconducting polymers. Nat Commun, 9, 534(2018).

[31] K S Park, J J Kwok, R Dilmurat et al. Tuning conformation, assembly, and charge transport properties of conjugated polymers by printing flow. Sci Adv, 5, eaaw7757(2019).

[32] Z C Zhang, B Y Peng, X D Ji et al. Marangoni-effect-assisted bar-coating method for high-quality organic crystals with compressive and tensile strains. Adv Funct Mater, 27, 1703443(2017).

[33] B Y Peng, Z R Wang, P K L Chan. A simulation-assisted solution-processing method for a large-area, high-performance C10-DNTT organic semiconductor crystal. J Mater Chem C, 4, 8628(2016).

[34] J C Lee, H Seo, M Lee et al. Investigation of the effect of 3D meniscus geometry on fluid dynamics and crystallization via in situ optical microscopy-assisted mathematical modeling. Adv Mater, 2105035(2021).

[35] S Chiodini, A Straub, S Donati et al. Morphological transitions in organic ultrathin film growth imaged by in situ step-by-step atomic force microscopy. J Phys Chem C, 124, 14030(2020).

[36] S Y Lang, Y Shi, Y G Guo et al. Insight into the interfacial process and mechanism in lithium-sulfur batteries: An in situ AFM study. Angew Chem Int Ed, 55, 15835(2016).

[37] A Kyndiah, M Checa, F Leonardi et al. Nanoscale mapping of the conductivity and interfacial capacitance of an electrolyte-gated organic field-effect transistor under operation. Adv Funct Mater, 31, 2008032(2021).

[38] H L Chen, M L Li, Z Y Lu et al. Multistep nucleation and growth mechanisms of organic crystals from amorphous solid states. Nat Commun, 10, 3872(2019).

[39] J Rivnay, S Inal, A Salleo et al. Organic electrochemical transistors. Nat Rev Mater, 3, 17086(2018).

[40] J Y Gerasimov, R Gabrielsson, R Forchheimer et al. An evolvable organic electrochemical transistor for neuromorphic applications. Adv Sci, 6, 1801339(2019).

[41] G D Spyropoulos, J N Gelinas, D Khodagholy. Internal ion-gated organic electrochemical transistor: A building block for integrated bioelectronics. Sci Adv, 5, eaau7378(2019).

[42] Z H Yi, G Natale, P Kumar et al. Ionic liquid–water mixtures and ion gels as electrolytes for organic electrochemical transistors. J Mater Chem C, 3, 6549(2015).

[43] H T Yuan, H Shimotani, J T Ye et al. Electrostatic and electrochemical nature of liquid-gated electric-double-layer transistors based on oxide semiconductors. J Am Chem Soc, 132, 18402(2010).

[44] A Giovannitti, C B Nielsen, D T Sbircea et al. N-type organic electrochemical transistors with stability in water. Nat Commun, 7, 13066(2016).

[45] P Lin, X T Luo, I M Hsing et al. Organic electrochemical transistors integrated in flexible microfluidic systems and used for label-free DNA sensing. Adv Mater, 23, 4035(2011).

[46] L H Jimison, S A Tria, D Khodagholy et al. Measurement of barrier tissue integrity with an organic electrochemical transistor. Adv Mater, 24, 5919(2012).

[47] A Campana, T Cramer, D T Simon et al. Electrocardiographic recording with conformable organic electrochemical transistor fabricated on resorbable bioscaffold. Adv Mater, 26, 3874(2014).

[48] P Leleux, C Johnson, X Strakosas et al. Ionic liquid gel-assisted electrodes for long-term cutaneous recordings. Adv Healthcare Mater, 3, 1377(2014).

[49] P Gkoupidenis, D A Koutsouras, G G Malliaras. Neuromorphic device architectures with global connectivity through electrolyte gating. Nat Commun, 8, 15448(2017).

[50] P Lin, F Yan, J J Yu et al. The application of organic electrochemical transistors in cell-based biosensors. Adv Mater, 22, 3655(2010).

[51] X D Ji, H Y Lau, X C Ren et al. Bioelectronics: highly sensitive metabolite biosensor based on organic electrochemical transistor integrated with microfluidic channel and poly(N-vinyl-2-pyrrolidone)-capped platinum nanoparticles. Adv Mater Technol, 1, 1(2016).

[52] H D Sun, J Gerasimov, M Berggren et al. N-Type organic electrochemical transistors: Materials and challenges. J Mater Chem C, 6, 11778(2018).

[53] S H Kim, K Hong, W Xie et al. Electrolyte-gated transistors for organic and printed electronics. Adv Mater, 25, 1822(2013).

[54] X Strakosas, M Bongo, R M Owens. The organic electrochemical transistor for biological applications. J Appl Polym Sci, 132, 1(2015).

[55] T Yokota, P Zalar, M Kaltenbrunner et al. Ultraflexible organic photonic skin. Sci Adv, 2, 1(2016).

[56] Y L Wu, P Liu, Y N Li et al. Enabling materials for printed electronics. 2006 IEEE LEOS Annual Meeting Conference Proceedings, 434(2006).

[57] O Ostroverkhova. Organic optoelectronic materials: Mechanisms and applications. Chem Rev, 116, 13279(2016).

[58] S R Forrest. Electronic appliances on plastic. Nature, 428, 911(2004).

[59] J Rivnay, L H Jimison, J E Northrup et al. Large modulation of carrier transport by grain-boundary molecular packing and microstructure in organic thin films. Nat Mater, 8, 952(2009).

[60] D J Yun, J Chung, C Jung et al. Pentacene orientation on source/drain electrodes and its effect on charge carrier transport at pentacene/electrode interface, investigated using in situ ultraviolet photoemission spectroscopy and device characteristics. J Electrochem Soc, 160, H436(2013).

[61] M Sanyal, B Schmidt-Hansberg, M F G Klein et al. In situ X-ray study of drying-temperature influence on the structural evolution of bulk-heterojunction polymer-fullerene solar cells processed by doctor-blading. Adv Energy Mater, 1, 363(2011).

[62] R P Li, H U Khan, M M Payne et al. Heterogeneous nucleation promotes carrier transport in solution-processed organic field-effect transistors. Adv Funct Mater, 23, 291(2013).

[63] P H Fang, F C Wu, H S Sheu et al. Analysis of ultrathin organic inverters by using in situ grazing incidence X-ray diffraction under high bending times and low voltage. Org Electron, 88, 106002(2021).

[64] D Yang, F C Löhrer, V Körstgens et al. In-operando study of the effects of solvent additives on the stability of organic solar cells based on PTB7-Th:PC₇₁BM. ACS Energy Lett, 4, 464(2019).

[65] G H Wang, K Q Huang, Z Liu et al. Flexible, low-voltage, and n-type infrared organic phototransistors with enhanced photosensitivity via interface trapping effect. ACS Appl Mater Interfaces, 10, 36177(2018).

[66] Z Q Song, Y H Tong, X L Zhao et al. A flexible conformable artificial organ-damage memory system towards hazardous gas leakage based on a single organic transistor. Mater Horiz, 6, 717(2019).

[67] K Myny. The development of flexible integrated circuits based on thin-film transistors. Nat Electron, 1, 30(2018).

[68] T Someya, Y Kato, T Sekitani et al. Conformable, flexible, large-area networks of pressure and thermal sensors with organic transistor active matrixes. PNAS, 102, 12321(2005).

[69] J W Borchert, B Y Peng, F Letzkus et al. Small contact resistance and high-frequency operation of flexible low-voltage inverted coplanar organic transistors. Nat Commun, 10, 1119(2019).

[70] H Sirringhaus. Device physics of solution-processed organic field-effect transistors. Adv Mater, 17, 2411(2005).

[71] G Giri, R P Li, D M Smilgies et al. One-dimensional self-confinement promotes polymorph selection in large-area organic semiconductor thin films. Nat Commun, 5, 3573(2014).

[72] M Y Aliouat, S Escoubas, M C Benoudia et al. In situ measurements of the structure and strain of a π-conjugated semiconducting polymer under mechanical load. J Appl Phys, 127, 045108(2020).

[73] L S Grodd, E Mikayelyan, T Dane et al. Local scale structural changes of working OFET devices. Nanoscale, 12, 2434(2020).

[74] C L Wang, H L Dong, W P Hu et al. Semiconducting π-conjugated systems in field-effect transistors: A material odyssey of organic electronics. Chem Rev, 112, 2208(2012).

[75] H Bässler, A Köhler. Charge transport in organic semiconductors. Top Curr Chem, 312, 1(2012).

[76] Y Olivier, V Lemaur, J L Brédas et al. Charge hopping in organic semiconductors: Influence of molecular parameters on macroscopic mobilities in model one-dimensional stacks. J Phys Chem A, 110, 6356(2006).

[77] D J Yun, J Chung, Y Kim et al. Direct comparative study on the energy level alignments in unoccupied/occupied states of organic semiconductor/electrode interface by constructing in situ photoemission spectroscopy and Ar gas cluster ion beam sputtering integrated analysis system. J Appl Phys, 116, 153702(2014).

[78] S Braun, W R Salaneck, M Fahlman. Energy-level alignment at organic/metal and organic/organic interfaces. Adv Mater, 21, 1450(2009).

[79] N Koch, A Kahn, J Ghijsen et al. Conjugated organic molecules on metal versus polymer electrodes: Demonstration of a key energy level alignment mechanism. Appl Phys Lett, 82, 70(2002).

[80] D J Yun, S H Park, J Hwang et al. In situ photoelectron spectroscopy study on the buffer role of multiwalled carbon nanotubes against thermal degradation in organic conducting composite films with PEDOT:PSS. J Phys Chem C, 123, 2238(2019).

[81] D J Yun, Y Yun, J Lee et al. In-depth investigation of the correlation between organic semiconductor orientation and energy-level alignment using in situ photoelectron spectroscopy. ACS Appl Mater Interfaces, 12, 50628(2020).

[82] C Wang, X C Ren, C H Xu et al. Organic single crystals: N-type 2D organic single crystals for high-performance organic field-effect transistors and near-infrared phototransistors. Adv Mater, 30, 1870114(2018).

[83] S L Cai, W G Zhang, R N Zuckermann et al. The organic flatland-recent advances in synthetic 2D organic layers. Adv Mater, 27, 5762(2015).

[84] F X Yang, S S Cheng, X T Zhang et al. 2D organic materials for optoelectronic applications. Adv Mater, 30, 1702415(2018).