Location History:
- Hudson, OH (US) (2000 - 2006)
- Hudson Village, OH (US) (2006)
- Akron, OH (US) (1994 - 2015)
- Richfield, OH (US) (2008 - 2020)
Company Filing History:
11 out of 656 
1 out of 49 
1 out of 33 
Years Active: 1994-2020
Title: **The Innovative Contributions of Stephen Z D Cheng**
Introduction
Stephen Z D Cheng, based in Richfield, OH, is a prolific inventor known for his significant contributions to the field of organic photovoltaic devices. With a remarkable portfolio of 16 patents, Cheng's work has been pivotal in advancing the technology behind solar energy conversion.
Latest Patents
Among his most recent innovations are two notable patents. The first patent describes an **organic polymer photo device with broadband response and increased photo-responsivity**. This device incorporates an anode terminal with a hole transporting network and a cathode terminal with an electron transporting network. Central to its functionality is a blended material that includes an organic polymer light-absorbing component designed to maximize efficiency by ensuring that the collection length exceeds the distance to the nearest transporting networks. This design allows for a larger light-absorbing area than the collection length itself.
The second recent patent focuses on **electron donor-fullerene conjugated molecules for organic photovoltaic cells**. This invention outlines a photovoltaic cell that utilizes an active area formed by electron donor-fullerene conjugated molecules, with the electron donor being a polymer conjugated with an electron acceptor, such as fullerene. The unique configuration creates dual channels for transport, enhancing the electronic coupling which results in increased short-circuit current density (J) and higher open-circuit voltage (V). Consequently, this innovative design leads to superior power conversion efficiency (PCE) in solar applications.
Career Highlights
Stephen Z D Cheng has spent significant time working with prestigious institutions like the University of Akron, where he has contributed to various research initiatives. Additionally, his tenure at Lightwave Microsystems Corporation has provided him with the industry experience necessary to translate theoretical concepts into practical applications.
Collaborations
Throughout his career, Cheng has collaborated with notable professionals in his field, including his colleague Frank Wayne Harris. Their combined expertise has helped propel advancements in organic material applications and photovoltaics.
Conclusion
Stephen Z D Cheng exemplifies innovation in the realm of organic photovoltaics. With his extensive patent portfolio and collaborative efforts, he continues to pave the way for advancements in sustainable energy technologies. His contributions not only enhance the efficiency of solar cells but also mark significant strides toward cleaner energy solutions.