主要从事有机半导体物理及器件的基础理论研究，包括：外场（光场、电场、磁场，等）对有机体系功能特性的调控，有机D/A异质结界面光物理过程，等。提出了有机体系内诱导超快激子输运和超快电荷分离的新机制（如：非均匀构型场和非均匀电场的诱导机制）；澄清了非富勒烯有机光伏体系分子内和分子间电荷转移协同效应对光伏过程的调控；等。目前在Phys. Rev. B, Physical Review Applied, Appl. Phys. Lett, J. Phys. Chem. Lett.和Advanced Science等高水平期刊上发表SCI论文70余篇，合作出版专著《低维量子物理》和《有机固体物理》。先后主持国家自然科学基金项目3项，省部级科研项目7项。

近期代表性论文 (详细论文请参考 https://www.researchgate.net/profile/Kun-Gao-16 )

[29] Maomao Zhang, Qiuxia Lu, Xiaojing Liu, Kun Gao*, and Zhong An*, “The effect of infrared push pulse on the relaxed exciton in single-component organic solar cells”, Appl. Phys. Lett. 123, 151102 (2023)

[28] Xinyu Mu, Yiwen Ji, Hang Yin, and Kun Gao*, "Interfacial Hole-Charge-Transfer Dynamics in Organic Solar Cells: A Dynamic Viewpoint", Physical Review Applied, 19, 054017 (2023)

[27] Yiwen Ji, Xinyu Mu, Hang Yin, Bin Cui, Xiaotao Hao, and Kun Gao*, "Revealing the Role of Donor/Acceptor Interfaces in Nonfullerene-Acceptor Based Organic Solar Cells: Charge Separation versus Recombination", J. Phys. Chem. Lett., 14, 3811-3817 (2023)

[26] Xuyang Fan, An Wei, Tillmann Klamroth, Yuan Zhang, Kun Gao, and Luxia Wang*, "Ultrafast multiexciton dynamics in molecular systems: Inclusion of exciton-exciton annihilation", Phys. Rev. B, 107, 134301 (2023)

[25] Haixia Hu, Xinyu Mu, Bin Li, Ruohua Gui, Rui Shi, Tao Chen, Jianqiang Liu, Jianyu Yuan*, Jing Ma, Kun Gao*, Xiaotao Hao*, and Hang Yin*, "Desirable uniformity and reproducibility of electron transport in single-component organic solar cells", Advanced Science, 2205040 (2023) 

[24] Lingxia Xu, Yiwen Ji, Xinyu Mu, Wenjing Wang, Luxia Wang, and Kun Gao*, “Effect of the push-pull electronic structure of nonfullerene acceptor molecules on the interfacial charge dynamics in heterojunction organic solar cells”, Adv. Energy Sustainability Res., 2200102 (2022)

[23] Yiwen Ji, Lingxia Xu, Xinyu Mu, Wenjing Wang, and Kun Gao*, “Photoinduced intra- and inter-molecular charge transfer dynamics in organic small molecules with intra-molecular push-pull electronic structure”, Journal of Materials Chemistry C, 10, 10106 (2022)

[22] Haixia Hu, Xinyu Mu, Wei Qin, Kun Gao*, Xiaotao Hao*, and Hang Yin*, “Rationalizing charge carrier transport in ternary organic solar cells”, Appl. Phys. Lett. 120, 023302 (2022)

[21] Lingxia Xu, Yiwen Ji, Wenjing Wang, Luxia Wang, and Kun Gao*, “Aggregation effect of acceptor molecules on the energy and charge transfer dynamics at an organic donor/acceptor interface”, Organic Electronics, 100, 106396 (2022)

[20] Xueyi Shi, Maomao Zhang, Wenjing Wang, and Kun Gao*, "Migration dynamics of excitons/biexcitons induced by a funnel-like nonuniform compression strain over organic polymers", Appl. Phys. Lett., 119, 263302 (2021)

[19] Haixia Hu, Lulu Fu, Kangning Zhang, Kun Gao, Jing Ma, Xiaotao Hao, and Hang Yin*, “Observing halogen-bond-assisted electron transport in high-performance polymer solar cells”, Appl. Phys. Lett., 119, 183302 (2021)

[18] Yiwen Ji, Lingxia Xu, Hang Yin, Bin Cui, Longlong Zhang, Xiaotao Hao, and Kun Gao*, “Synergistic effect of incorporating intra- and inter-molecular charge transfer in nonfullerene acceptor molecules for highly-efficient organic solar cells”, Journal of Materials Chemistry A, 9, 16834 (2021)

[17] 高琨, 秦伟, 郝晓涛*, 解士杰*, “有机半导体激发态的量子调控”, 科学通报 (山东大学百廿校庆物理学专辑), 66, doi: 10.1360/TB-2020-1545 (2021)

[16] Maomao Zhang, Xueyi Shi, Xinyu Mu, Luxia Wang, and Kun Gao*, “Re-excitation dynamics of a “cold” charge transfer state at organic donor/acceptor interfaces”, Appl. Phys. Lett., 118, 133301 (2021)

[15] Chong Li, Yuan Li, Lingxia Xu, Ruixuan Meng, and Kun Gao*, “Exciton-to-charge dynamics driven by the nonuniform polymer packing at donor/acceptor Interfaces”, The Journal of Physical Chemistry C, 124, 1898 (2020)

[14] Yiwen Ji, Lingxia Xu, Xiaotao Hao, and Kun Gao*, “Energy loss in organic solar cells: mechanisms, strategies, and prospects”, Solar RRL, 4, 2000130 (2020)

[13] Lingxia Xu, Yiwen Ji, Xueyi Shi, Luxia Wang, and Kun Gao*, “Energy and charge transfer dynamics at an organic donor/acceptor interface”, Organic Electronics, 85, 105886 (2020)

[12] Maomao Zhang, Wei Qin, Yuan Li, and Kun Gao*, “Directional and ultrafast migrations of excitons/biexcitons in organic polymers by utilizing a local nonuniform electric field”, Journal of Materials Chemistry C, 8, 11274 (2020)

[11] Maomao Zhang, Qiuxia Lu, Fanyao Qu, and Kun Gao*, “Sub-bandgap photoexcited dynamics at an organic donor/acceptor photovoltaic interface”, Optics Letters, 45, 4492 (2020)

[10] Longlong Zhang, Yuying Hao, and Kun Gao, “Efficient quantum theory for studying cold charge-transfer state dissociations in donor-acceptor heterojunction organic solar cells”, Appl. Phys. Lett., 117, 123301 (2020)

[9] Chong Li, Yuan Li, Maomao Zhang, Lingxia Xu, Wei Qin, and Kun Gao*, “Ultrafast Charge Separation from a “Cold” Charge-Transfer State Driven by Nonuniform Packing of Polymers at Donor/Acceptor Interfaces”, The Journal of Physical Chemistry C, 123, 2746 (2019)

[8] Lingxia Xu, Chong Li, Xiaotao Hao, and Kun Gao*, “Effect of the third component on charge transfer character in ternary organic solar cells with a cascade-type electronic structure”, Physics Letters A, 383, 126001 (2019)

[7] Maomao Zhang, Yuan Li, Chong Li, Wei Qin, and Kun Gao*, “Charge Separation from a “Cold” Charge-Transfer State Driven by a Nonuniform Electric Field in Polymer-Based Donor/Acceptor Heterojunctions”, The Journal of Physical Chemistry C, 122, 20676 (2018)

[6] Maomao Zhang, Wenjing Wang, Sun Yin, Ruixuan Meng, Chong Li, and Kun Gao*, “Temperature effect on the internal conversion dynamics following different stimulated absorptions in a conjugated polymer”, Organic Electronics, 56, 201 (2018)

[5] Ruixuan Meng, Yuan Li, Kun Gao*, Wei Qin, and Luxia Wang, “Ultrafast Exciton Migration and Dissociation in π-Conjugated Polymers Driven by Local Nonuniform Electric Fields”, The Journal of Physical Chemistry C, 121, 20546 (2017)

[4] Ruixuan Meng, Yuan Li, Chong Li, Kun Gao*, Sun Yin, and Luxia Wang, “Exciton Transport in π-Conjugated Polymers with Conjugation Defects”, Physical Chemistry Chemical Physics, 19, 24971 (2017)

[3] Chong Li, Kun Gao*, Ruixuan Meng, Liu Yang, and Maomao Zhang, “Effect of intrachain configuration disorder on the exciton delocalization in π -conjugated polymers”, Organic Electronics, 48, 342 (2017)

[2] Fujiang Yang, Ruixuan Meng, Gaiyan Zhang, Kun Gao*, Shijie Xie, “Migration of an exciton in organic polymers driven by a nonuniform internal electric field”, Organic Electronics, 30, 171 (2016)

[1] Kun Gao*, Shijie Xie, Sun Yin, Ruixuan Meng, Yuan Li, “Study on the internal conversion dynamics following different electron transfer at a donor/acceptor polymer heterointerface”, Organic Electronics, 28, 73 (2016)